thanks a lot for the posting.
for the 1st Q, shouldnt' it be radius*perimeter (without the 1/2???)
and are the figures given in the test normally to scale? or we can't assume anything unless stated??
once again congrat!!!!!!!
many thanks
sorry but one more question
for standard deviation in the square root sign, should we divide everything by N or (N-1)????
many thanks
PS: sorry , I could only type Eng on this stupid comp.
8. two words, utah and another word with five letters but has only letter 'a' in common with utah. choose one letter from each word, what's the probablity that two same letters are chosen.
answer is 1 / 20.