31% 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.

a) 0.23

b)0.54

c)0.9856

Step-by-step explanation:

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38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

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what's the question?

step-by-step explanation:

there is no question.