Study the given information carefully to answ | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Total number of marbles in the urn $= 4 + 5 + 2 + 3 = 14$.Total number of ways to select $2$ marbles out of $14$ is given by ${}^{14}C_2 = \frac{1

Vedclass · Accepted Answer

None of these

Vedclass · Answer

(D) Total number of marbles in the urn $= 4 + 5 + 2 + 3 = 14$.Total number of ways to select $2$ marbles out of $14$ is given by ${}^{14}C_2 = \frac{14 	imes 13}{2 	imes 1} = 91$.The event 'both are red or at least $1$ is red' is equivalent to the event 'at least $1$ is red'.Number of ways to select $0$ red marbles $= {}^{12}C_2 = \frac{12 	imes 11}{2 	imes 1} = 66$.Number of ways to select at least $1$ red marble $= 	ext{Total ways} - 	ext{Ways to select } 0 	ext{ red marbles} = 91 - 66 = 25$.Therefore,the required probability $= 25/91$.

Study the given information carefully to answer the question that follows. An urn contains $4$ green,$5$ blue,$2$ red,and $3$ yellow marbles. If $2$ marbles are drawn at random,what is the probability that both are red or at least $1$ is red?

Similar Questions

If any four numbers are selected and they are multiplied,then the probability that the last digit of the product will be $1, 3, 5$ or $7$ is

What is the probability of getting a total of less than $12$ in the throw of two dice?

Two coins are tossed. Let $A$ be the event that the first coin shows head and $B$ be the event that the second coin shows a tail. The two events $A$ and $B$ are:

Two dice are thrown. If the first die shows $5$,then the probability that the sum of the numbers on both dice is $8$ or more than $8$ is:

In a box,there are $2$ red,$3$ black,and $4$ white balls. If three balls are drawn together,what is the probability that the balls drawn are of the same colour?

Vedclass Test Series

Exam Paper Generator

Online Exam Module