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On one page of a telephone directory, th...

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:
Without looking at the page, the pencil is placed on one of the numbers i.e the number it chosen at random. What is the probability that the digit in its unit place is 6?

Text Solution

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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.
`P=(bb"frequency on digit 6")/(bb"total number of telephones")=14/200` `P=0.07`
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