A town has 5000 residents. A survey finds that 81 residents
1 answer:
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Answer:
72 doctors recommended the medicine
Step-by-step explanation:
The question above is interpreted thus.
9 out of 10 implies 9/10. If 80 doctors were surveyed, the number of doctors that recommended the medicine is 9/10 of 80 doctors. Therefore,
Therefore, in a survey where 9 out of 10 doctors recommended a certain medicine; and 80 doctors were surveyed, 72 doctors recommended the medicine.
Answer:
0.0181,0.2693,0.1092,0.4163
Step-by-step explanation:
Given that a certain tennis player makes a successful first serve 64% of the time.
Since each serve is independent of the other
X the no of serves in is Binomial with n = no of times he serves =9
and p = constant probability = 0.64
X is Bin (9,0.64)
Probability that she get in
a) all 9 serves in?
=
b) exactly 6 serves in?
P(x=6)
=
c) at least 7 serves in
=
d) no more than 6 serves in
=