Question

From the set of numbers (1, 2, 3, 4, 5, 6, 7, 8,
9), two numbers are picked at random. What
is the probability that their product has its
last digit as 6?
​

Answer 1

Sample Space:

1 x 6 = 6

2 x 3 = 6

2 x 8 = 16

7 x 8 = 56

Total Outcomes: 81 (There are 9 numbers and all are multiplied with each other, so 9 x 9 = 81)

Probability: 4/81 = 0.049 ( It is necessary to write in decimal.)