Question

A number is selected at random from the numbers 3, 5, 5, 7, 7, 7, 9, 9, 9, 9 The probability that the selected number is their average is
A. 1/10
B. 3/10
C. 7/10
D.9/10

Answer 1

Answer:

4/10

Step-by-step explanation:

s-(3,5,5,7,7,7,9,9,9,9.)

n(s)-10

event A is average number

A-{9,9,9,9}

n(A)-4

p(A)-n(A)/n(S)

p(A)-4/10

Answer 2

Answer:

(A) 1/10

Step-by-step explanation:

total outcome is 10

the smallest number is 3

favourable outcome is 1

let p(A) be the average number

p(A) = favourable outcome/ total outcome

= 1/10

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