Question

Example 4: 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 Table 15.7:
0
1
2
3
4
5
6
7
8
9
Digit
Frequency
22
26
22
22
20
10
14
28
16
20
Without looking at the page, the pencil is placed on one of these numbers, i.e., the
number is chosen at random. What is the probability that the digit in its unit place is 6?

Answer 1

Answer:

So the frequency having value 14 is on the digit "6",  

total telephone numbers in telephone directory is 200 and total number of frequency on the digit 6 is 14.

=frequency on digit 6/total number of telephones

=14/200

probabaility=0.07

probability that the digit is at its units place is 0.07 only