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

On one page of a telephone directory , there were 200 phone numbers . The frequency distribution of their unit's digits is given below :

One of the numbers is chosen at random from the page . What is the probability that the unit's digit of the chosen number is (i) 5 ? (ii) 8 ?

A

(i) 0.02 (ii) 0.08

B

(i) 0.12 (ii) 0.18

C

(i) 0.1 (ii) 0.08

D

(i) 0.12 (ii) 0.08

Text Solution

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The correct Answer is:
D
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RS AGGARWAL-PROBABILITY-Exercise 19
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  4. A die is thrown 300 times and the outcomes are noted as given below : ...

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  7. On a particular day , at a crossing in a city , the various types of 2...

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  8. On one page of a telephone directory , there were 200 phone numbers . ...

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  11. In a cricket match , a batsman hits a boundary 6 times out of 30 balls...

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  12. An organisation selected 2400 families at random and surveyed them to ...

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  13. The table given below shows the marks out by 30 students in a test . ...

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  14. The table given below shows the ages of 75 teachers in a school . ...

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  15. Following are the ages (in years) of 360 patients , getting medical tr...

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