Cambridge IGCSE Mathematics

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[Afzal1]

need help in 2b
0580/41/m/j/2010

 

[ciemathematics]

need help in 2b
0580/41/m/j/2010

As per the question number Q-2 B. For the number of people of families of another n students. As you already know:

mean = summation of observations/ no of observations

As given the mean of these number of people of families of another n students is 3.
Hence substituting in the formula of mean:

3 = no of people in families of another n students/n

Hence, no of people in families of another n students = 3n

Mean number of all(40 + 3n) students = total number of families/ total number of students
= 190+3n/ 40+n




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[Stefanny]

can you help me about the circle props and mensuration? and also function please? thankyou!