Question

37.. If from set of natural numbers 1 to 9, 1800 times selection is
randomly done then the number of times. 3 is expected to come is
(A) 180
(B) 900
(C) 200
D) 500​

Answer 1

The no. of times 3 is expected to come when numbers between 1 to 9 are drawn 1800 times = 200

Total no. Of possible outcomes = 9

Probability that 3 will come in the first time = 1/9

Probability that 3 will come in any selection between 1 to 1800 times = 1/9

No. Of times 3 is expected to come from total of 1800 random selections = 1800 × 1/9

= 200