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Mathematics: Post your doubts here!

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Probability first one was 19/28. Second one asked that she then picks a third sweet, calculate the probability that she does not pick lemon in any of the 3 times. I did O,O,S and S,O,O and O,S,O and got 3/28. I didn't use cos anywhere except first question of trigonometry, the 4 mark one, calculating the length thingy..

Was probability of picking a lemon 5/8?
Because then i did 1-5/8 which is 3/8 for not getting lemon. Then 3/8 * 3/7 * 3/6
 
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And please tell me one more think confirmed that if the examiners mark if the previous part is wrong but in second part formula and everything is right but answer is wrong due to first part?
like for eg. In the cone and circular base question where we had to find l... if our l is wrong but the next part in which they asked curved surface area , if our Woking using l is correct but final answer wrong due to l then will the examiners give mark?

Yes, i think they use ft or ecf in math, although maybe mark for the answer will be wrong but method will gain
 
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Nope there were 3 Lemon, so probability of not picking lemon was 5/8. But that's wrong too I guess, because they said she "THEN" picked 3rd one which means first 2 times she picked different colors only. So we had to do combinations OSO SOO and OOS.
Oh yes then i did 5/8 * 4/7 * 3/6.
This is correct i think, because when not picking lemon is 5/8 it accounts for probabilities of other qualities.
 
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And in that light house closest distance. ... did we had to calculate x or y?
 

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Hahahah i probably failed bearing, ratio and the histogram explanations. The rest was good enough :)
Curve will surely lower compared to last year.
Omg hi-5 i usually love ratio !! but this time it was yuck ... really i found the histogram the only easy question :p
 
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