On one page of a telephone directory, there were 200 telephone numbers. The frequency distribution of their unit place digit (for example, in the number 25828573, the unit place digit is 3) is given in the table below: Digit            0       1       2       3       4                     5       6       7       8       9 Frequency    22     26     22     22     20                     10     14     28     16     20 A number is chosen at random, find the probability that the digit at its unit’s place is: (i)               6  (ii) a non-zero multiple of 3 (iii)           a non-zero even number  (iv)  an odd number.

Explanation

Total telephone number =200

1) P=14/200=0.07

2)P=56/200=0.28

3)P=72/200=0.26

4)P=106/200=0.53.