50% of babies are born female.Olive wants to find the probability 20 or more of the 50 babies born today were female. If we use
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Answer:
Step-by-step explanation:
Hello,
let's find a and b reals so that
we identify the terms in
9 = 3a
we identify the terms in x
-18 = 3b + a
we identify the constant terms
-7 = b
so ti goes with a = 9/3 = 3, b = -7
so we can write
so
hope this helps