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Question

Five digited numbers are formed using (0,2,4,5,7)
without repetition. One number is selected at random. The probability that it
is divisible by 5 is


A
3/16
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B
5/16
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C
7/16
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D
9/16
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Solution

The correct option is C 7/16
Given,

No. of five digit numbers =(0,2,4,5,7)

4×4! numbers,

4×4×3×2×1=4×24=96

No. of numbers divisible by 5,

Ending with 0 are, 4!=24

Ending with 5 are, 3×3!=18

No. of numbers divisible by 5 are 18+24=42

Probability that the number is divisible by 5,

=4296=1432=716

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