Home
Class 12
MATHS
A rifleman is firing at a distance targe...

A rifleman is firing at a distance target and hence has only 10% chance of hitting it. Find the number of rounds; he must fire in order to have more than 50% chance of hitting it at least once.

A

5

B

7

C

9

D

11

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • BINOMIAL DISTRIBUTION

    TARGET PUBLICATION|Exercise COMPETITIVE THINKING|30 Videos

  • APPLICATIONS OF DERIVATIVES

    TARGET PUBLICATION|Exercise EVALUATION TEST|20 Videos

  • CONTINUITY

    TARGET PUBLICATION|Exercise Evaluation Test|10 Videos

Similar Questions

Explore conceptually related problems

A rifleman is firing at a distant target ansd hence, has only 10% chances of hitting it. Find the number of rounds, he must fire in order to have more than 50% chances of hitting it at least once.

Determine the minimum number of dice when we throw all of them we have at least a 50% chance of getting 6.

The probability of a man hitting a target in one fire is (1)/(5). Then the minimum number of fire he must follow in order-or-to make his chance of hitting the target more than (3)/(4) is

The probability of a man hitting a target in one fire is 1/4 . How many times at least must he fire at the target in order that his chance of hitting the target at least once will exceed 2/3 ?

A man firing a distant target has 20% chance of hitting the target in one shot. If P be the probability of hitting the target in atmost 'n' attempts where 20P^(2)-13P+2 le0 . then maximum value of n is.

If probability of hitting a target is 1/10 , Then number of shot required so that probability to hit target at least once is greater than 1/4 .

The probability of a man hitting a target is 1/2. How many xx must he fire so that the probability of hitting the target at least once is more than 90% .

In a bombing attack , there is 50% chance that a bomb will hit target . At least two independent hits are required to destroy the target completely. Then the minimum number of bombs, that must be dropped to ensure that there is at least 90% chance of completely destroying the target , is ________

The probability of a shooter hitting a target is (3)/(4). How many minimum number of xx must he/she fire so that the probability of hitting the target at least once is more than 0.99?