In a single throw of two dice, probability of obtaining a total of 7 or 9 , is

English

Gujarati

Hindi

14.Probability

easy

In a single throw of two dice, the probability of obtaining a total of $7$ or $9$, is

A

$\frac{5}{{18}}$

B

$\frac{1}{6}$

C

$\frac{1}{9}$

D

None of these

Solution

(a) $7 \to \left\{ {(6,\,\,1),\,(5,\,\,2),\,(4,\,\,3),\,(3,\,\,4),\,(2,\,\,5),\,(1,\,\,6)} \right\}$

$9 \to \left\{ {(6,\,\,3),\,(5,\,\,4),\,(4,\,\,5),\,(3,\,\,6)} \right\}$

Required probability $ = \frac{{6 + 4}}{{36}} = \frac{5}{{18}}.$

Standard 11

Mathematics

Share

Similar Questions

A letter is chosen at random from the word $\mathrm {'ASSASSINATION'}$. Find the probability that letter is a consonant.

easy

If two dice are thrown simultaneously then probability that $1$ comes on first dice is

easy

A person can kill a bird with probability $3/4$. He tries $5$ times. What is the probability that he may not kill the bird

medium

Five horses are in a race. $Mr. \,A$ selects two of the horses at random and bets on them. The probability that $Mr.\, A$ selected the winning horse is

easy

(AIEEE-2003)

Two persons each make a single throw with a die. The probability they get equal value is ${p_1}$. Four persons each make a single throw and probability of three being equal is ${p_2}$, then

hard