New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Probability question

2022 · 24 Jun · Shift 1 · Q25

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Mathematics
Probability
2022 · 24 Jun · Shift 1 · Q25

Probability question

2022 · 24 Jun · Shift 1 · Q25

JEE MainMathematicsProbabilityMCQ+4 / −1

Bag A contains 2 white, 1 black and 3 red balls and bag B contains 3 black, 2 red and n white balls. One bag is chosen at random and 2 balls drawn from it at random, are found to be 1 red and 1 black. If the probability that both balls come from Bag A is

{6 \over {11}}

, then n is equal to

\underline{\hspace{2cm}}

.

A
13
B
6
C
4
D
3

More from Probability

A random variable X has the following probability distribution : The value of P(1 < X < 4 | X $\leq$ 2) is equal to : Includes table2022 · MCQ
If the numbers appeared on the two throws of a fair six faced die are $α$ and $β$ , then the probability that $x^{2} + α x + β > 0$ , for all $x \in R$ , is :2022 · MCQ
If $A$ and $B$ are two events such that $P (A) = \frac{1}{3}, P (B) = \frac{1}{5}$ and $P (A \cup B) = \frac{1}{2}$ , then $P (A ∣ B^{'}) + P (B ∣ A^{'})$ is equal to :2022 · MCQ
Let E1 and E2 be two events such that the conditional probabilities $P (E_{1} ∣ E_{2}) = \frac{1}{2}$ , $P (E_{2} ∣ E_{1}) = \frac{3}{4}$ and $P (E_{1} \cap E_{2}) = \frac{1}{8}$ . Then :2022 · MCQ
A biased die is marked with numbers 2, 4, 8, 16, 32, 32 on its faces and the probability of getting a face with mark n is $\frac{1}{n}$ . If the die is thrown thrice, then the probability, that the sum of the numbers obtained is 48, is :2022 · MCQ
Let $E_{1}, E_{2}, E_{3}$ be three mutually exclusive events such that $P (E_{1}) = \frac{2 + 3 p}{6}, P (E_{2}) = \frac{2 - p}{8}$ and $P (E_{3}) = \frac{1 - p}{2}$ …2022 · MCQ
If the probability that a randomly chosen 6-digit number formed by using digits 1 and 8 only is a multiple of 21 is p, then 96 p is equal to .2022 · Numerical
Let $S$ be the sample space of all five digit numbers. It $p$ is the probability that a randomly selected number from $S$ , is a multiple of 7 but not divisible by 5 , then $9 p$ is equal to :2022 · MCQ