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12th CBSE
IMPORTANT
Earn 100

Which one is not a requirement of a binomial distribution?

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Important Questions on Probability

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12th CBSE
IMPORTANT
Two cards are drawn from a well shuffled deck of 52 playing cards with replacement. The probability, that both cards are queens, is
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12th CBSE
IMPORTANT
The probability of guessing correctly at least 8 out of 10 answers on a true-false type examination is
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12th CBSE
IMPORTANT
The probability that a person is not a swimmer is 0.3. The probability that out of 5 persons 4 are swimmers is
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12th CBSE
IMPORTANT

The probability distribution of a discrete random variable X is given below :

X 2 3 4 5
PX 5k 7k 9k 11k

Then, the value of k is

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12th CBSE
IMPORTANT

For the following probability distribution:

X-4-3-2-10P(X)0.10.20.30.20.2

E(X) is equal to:

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12th CBSE
IMPORTANT

For the following probability distribution

X1234P(X)1101531025

EX2 is equal to

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12th CBSE
IMPORTANT
Suppose a random variable X following the binomial distribution with parameters and p, where 0<p<1 . If P(X=r) P(X=n-r) is independent of n and r, then p equals 
MEDIUM
12th CBSE
IMPORTANT
In a college, 30 % students fail in physics, 25 % fail in mathematics and 10 % fail in both. One student is chosen at random. The probability that she fails in physics if she has failed in mathematics is