Question

17​% adults favor the use of unmanned drones by police agencies. Twelve U.S. adults are randomly selected. Find the probability that the number of U.S. adults who favor the use of unmanned drones by police agencies is​ (a) exactly​ three, (b) at least​ four, (c) less than eight.

Answer 1

Hello SIr/ Mam

Given that:

17% adults favor use of unmanned drones

Sample SIze = 12

Hence, it follows binomial distribution.

p	17.00%
n	12
x
x	P(x)
0	0.1069
1	0.2627
2	0.2960
3	0.2021
4	0.0931
5	0.0305
6	0.0073
7	0.0013
8	0.0002
9	0.0000
10	0.0000
11	0.0000
12	0.0000

Hence, using the above table:

(a) 0.2021

(b) 0.1324

(c) 0.9998

I hope this solves your doubt.

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