A bag contains 5 black and 6 red balls

Asked by admin @ 12/08/2021 in Math viewed by 346 People

Question 8 A bag contains 5 black and 6 red balls. Determine the number of ways in which 2 black and 3 red balls can be selected.

Class X1 - Maths -Permutations and Combinations Page 153

Answered by admin @ 12/08/2021

A bag contains 5 black and 6 red balls .

number of ways of selection 2 black balls from 5 black balls = 5C2

number of ways of selection 3red balls from 6 red balls = 6C3

a/c to fundamental principle of counting,
total number of selection = 5C2 × 6C3
= 5!/2!(5-3)! × 6!/3!(6-3)!
= 5 × 4/2 × 6 × 5 × 4/6
= 10 × 20
= 200 ways .

A bag contains 4 red balls and 5 black balls

Asked by admin @ 02/08/2021 in Math viewed by 332 persons

A bag contains 4 red and 5 black balls. Another bag contains 5 red, 3 black balls. If one ball is drawn at random from each bag. Then the probability …

A bag contains 4 red and 6 black balls

Asked by admin @ 13/08/2021 in Math viewed by 309 persons

a bag contains 4 red and 6 black balls .a ball is drawn at random from the bag its colour is observed and this ball along with two additional balls …

A bag contains 5 red balls and some blue

Asked by admin @ 10/08/2021 in Math viewed by 345 persons

A bag contains 5 red balls and some blue balls if the probability of drawing blue ball is double that of red ball then find the number of blue balls …

A bag contains 5 white balls 7 red balls

Asked by admin @ 20/08/2021 in Math viewed by 307 persons

A bag contains 5 white balls, 7 red balls, 4 black balls and 2 blue balls. One ball is drawn at random from the bag. Find the probability that the …

A bag contains 6 red balls and some blue

Asked by admin @ 17/08/2021 in Math viewed by 326 persons

A bag contains 6 red balls some blue balls .if the prbablity of drawing a blue ball is twice the probability of drawing red balls find number of blue balls

A box contains 4 red balls and 6 black balls

Asked by admin @ 04/08/2021 in Math viewed by 362 persons

A box contains 4 red balls and 6 black balls. Three balls are selected randomly from the box one after another, without replacement. The probability that the selected set contains …

A bag contains white black and red balls only

Asked by admin @ 13/08/2021 in Math viewed by 299 persons

A bag contains white, black and red balls only. A ball is drawn at random from the bag. If the probability of getting a white ball is 3/10 and that …

A bag contains 4 red and 3 black balls

Asked by admin @ 17/08/2021 in Math viewed by 301 persons

A bag contains 4 red and 3 black balls .a second bag contains 2 red and 3 black balls. one bag is selected at random.if from the selected bag one …

A bag contains 3 red and 7 black balls

Asked by admin @ 17/08/2021 in Math viewed by 291 persons

A bag contains 3 red and 7 black balls. Two balls are selected at random with replacement. If second selected is given to be red, what is the probability that …

A bag contains 6 black and 8 white balls

Asked by admin @ 11/08/2021 in Math viewed by 377 persons

A bag contains 6 black and 8 white balls one ball is drawn at random what is the probability that the ball drawn is white

An urn contains 5 red and 2 black balls

Asked by admin @ 20/08/2021 in Math viewed by 255 persons

an urn contain 5 red and 2 black balls , two balls are randomly drawn without replacement . let x represent number of black ball draw .what are the possible …