Answer:
A. 30 adults; B. 24 not dolls
Step-by-step explanation:
A.

B.
If five-eighths of the prizes were dolls, then three-eighths of the prizes were not dolls.

25x
400
x
16
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Answer:
H0:p=0.41
Step-by-step explanation:
The null hypothesis always contain equality i.e. (=) sign. The null hypothesis contains the statement regarding population parameter. Here, the claim about population proportion is mentioned in the statement that 10 p.m. newscast of local CBS reaches 41% of viewers. So, the null hypothesis would be
Null hypothesis:H0: p=0.41.