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In order to get a head at least once wit...

In order to get a head at least once with probability `>=0.9,`the minimum number of timesa unbiased coin needs to be tossed is

A

5

B

4

C

5

D

6

Text Solution

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The correct Answer is:
B
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MTG-WBJEE-STATISTICS AND PROBABILITY-WB JEE Previous Years Questions ( CATEGORY 1 : Single Option Correct Type ( 1 Mark) )
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