Maths, Addmaths and Statistics: Post your doubts here!

[student8]

A chess club has 10 members of whom six are men and four are wo
men. A team of four
members is selected to play in a match.
a) Find the number of different ways of selecting the team if:
i) all the players are to be the same sex,
ii) there must be an equal number of men and women.
b) Given that the six men include two brothers, find the total numb
er of ways in which the team
can be selected if one of the brothers, but not both, must be included.
plz ans he last part of this question.urgent

 

[Suchal Riaz]

View attachment 21521

ur answer is wrong. sorry.answer is (-2,10), (2,-10)
but thanks for solving.

 

[qasim9]

View attachment 21509
View attachment 21512

Thanks bro
I will surely pray for all of u

 

[Suchal Riaz]

Thanks bro
I will surely pray for all of u

prayer of u people mean alot to me. thanks. pray for everybody who works hard.

 

[Xain ali]

After the initiative taken by Math_angel in the IGCSE section, I have made this topic for students of O'levels. You can post any question or any problem here and me along with other XPF users will try to help you as soon as possible. This topic is a feasible option as it won't bring a hassle of making new topics for every question and it will also allow the helpers to not miss any of your questions and have one common topic for answering your Mathematics queries.

So start posting your problems.

notes for maths

 

[tdk]

Could anybody send me the Solutions of Maths Syllabus D (CIE) Past QP(from 2000 to 2012) ASAP. I want the full SOLUTIONS, not the Mark Schemes. It's urgent. Plzzzzzzz help me.

 

[tdk]

My email: [email protected]

 

[Suchal Riaz]

Could anybody send me the Solutions of Maths Syllabus D (CIE) Past QP(from 2000 to 2012) ASAP. I want the full SOLUTIONS, not the Mark Schemes. It's urgent. Plzzzzzzz help me.

i don't have any but if u consider my useless advice then do the papers ur self and ask me any question. i promise to help u. thats all what i can do.

 

[mak kings]

hi cud nabody explain me any doubt plzplzplz...it wub b realy very heplful
hi anybody there to help me i ve got problems in these questions and am unable to understand the answer at all:
for mj-p4-2007 http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s07_qp_4.pdf
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s07_ms_4.pdf
Q4(d)
Q7(d)
Q9(b)

for mj-p41-2010
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_41.pdf
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_ms_41.pdf
Q2(b)
Q7(c)(i)
Q8(d)(iii)

:- your help will b a big one to me.!!plz help

 

[mohdumar]

A chess club has 10 members of whom six are men and four are wo
men. A team of four
members is selected to play in a match.
a) Find the number of different ways of selecting the team if:
i) all the players are to be the same sex,
ii) there must be an equal number of men and women.
b) Given that the six men include two brothers, find the total numb
er of ways in which the team
can be selected if one of the brothers, but not both, must be included.
plz ans he last part of this question.urgent

b) we have to choose 1 from 2 brothers so number of ways to do this 2C1 = 2
remainning 10 - 2 = 8 members left
we have to choose 4-1=3 members from the remaining 8 members
so 8C3 = 56
total number of ways to do this 56*2 = 112

 

[Ishrar Afrida]

Help please.

 

[Suchal Riaz]

Help please.

here's ur answer

 

[student8]

b) we have to choose 1 from 2 brothers so number of ways to do this 2C1 = 2
remainning 10 - 2 = 8 members left
we have to choose 4-1=3 members from the remaining 8 members
so 8C3 = 56
total number of ways to do this 56*2 = 112

jazzakallah

 

[Ishrar Afrida]

here's ur answer

Thanks a lot!

 

[Ishrar Afrida]

It is given that f(x) = a cos(bx)+c, where a, b and c are integers. The maximum value of f is
11, the minimum value of f is 3 and the period of f is 72 °. Find the value of a, of b and of c.
How do you find a? :/
I found b= 360/72=5.

 

[soumayya]

It is given that f(x) = a cos(bx)+c, where a, b and c are integers. The maximum value of f is
11, the minimum value of f is 3 and the period of f is 72 °. Find the value of a, of b and of c.
How do you find a? :/
I found b= 360/72=5.

 

[Zoya Shahab]

Find x such that
2e^x=3-e^(x+1)
I have no idea how to solve this I tried substituting y for e^x but then e^1 remains! Please explain me how to do this!!!

 

[PhyZac]

Find x such that
2e^x=3-e^(x+1)
I have no idea how to solve this I tried substituting y for e^x but then e^1 remains! Please explain me how to do this!!!

Assalamu Alikum Wa Rahmaullahi Wa Barakatoho

2e^x = 3-e^(x+1)
2e^x = 3- (e^x * e^1)
2e^x + (e^x * e) =3
e^x(2+e) =3
e^x = 3/(2+e)
ln[e^x] = ln [3/(2 +e)]
x = -0.4528....

 

[soumayya]

Find x such that
2e^x=3-e^(x+1)
I have no idea how to solve this I tried substituting y for e^x but then e^1 remains! Please explain me how to do this!!!

 

[Zoya Shahab]

Without using a calculator evaluate
(lg 5)^2+lg2 lg50