Susan flipped a fair coin N times. what fraction of the flips came up heads
1) N = 24
2) The number of flips that came up tails was 3/8(N)
the answer from Kaplan
is "B" (I picked C). Their rationale is: statement 2 tells us the number of flips that came up tails as a fraction of N. The only other options is heads so we know the fraction of flips that came up heads. N is then irrelevant.
why is N irrelevant? Dont i need N to figure out the exact probablity here.
when the question asks for fractions, portions, percentage, we donot need absolute value. therefore, n is irrelavant. if the question were "how many times", it would be C and N would be relavant..
from B, the fraction is 1 - 3/8 = 5/8.