A bag contains 5 red balls and some blue

Asked by admin @ 10/08/2021 in Math viewed by 353 People

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 in the bag

Answered by admin @ 10/08/2021

Solution :

Let there be x blue balls in the bag.

∴ Total number of balls in the bag = 5 + x

Now,

$p_{1}$ = Probability of drawning a blue ball = $\frac{x}{5 + x}$

$p_{2}$ = Probability of drawing a red ball = $\frac{5}{5 + x}$

But it is given that $P_{1}$ = $2p_{2}$

⇒ $\frac{x}{5 + x}$ = $2 \times \frac{5}{5 + x}$

⇒ x = 10

A bag contains 5 red and 3 blue balls

Asked by admin @ 23/08/2021 in Math viewed by 413 persons

A bag contains 5 red and 3 blue balls. If 3 balls are drawn at random without replacement then find the probability of getting exactly one red ball.

A bag contains 6 red balls and some blue

Asked by admin @ 17/08/2021 in Math viewed by 336 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 bag contains 8 red and 5 white balls

Asked by admin @ 17/08/2021 in Math viewed by 358 persons

A bag contains 5 white and 8 red balls. two drawing of 3 balls are made such that (a) balls are replaced before the second trial (b) the balls are …

A bag contains 5 black and 6 red balls

Asked by admin @ 12/08/2021 in Math viewed by 353 persons

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 - …

A bag contains 5 white balls 7 red balls

Asked by admin @ 20/08/2021 in Math viewed by 315 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 4 red balls and 5 black balls

Asked by admin @ 02/08/2021 in Math viewed by 339 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 white black and red balls only

Asked by admin @ 13/08/2021 in Math viewed by 306 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 3 red and 2 blue marbles

Asked by admin @ 20/08/2021 in Math viewed by 279 persons

(2) A bag contains 3 red and 2 blue marbles. A marble is drawn at random. The probability of drawing a black ball is (a) 3/5 (b) 2/5 (c) 0/5 …

A bag contains 2 red 3 green 2 blue

Asked by admin @ 11/08/2021 in Math viewed by 334 persons

A bag contains 2 red, 3 green and 2 blue gum balls. What is the probability of selecting a green one?

A bag contains 4 red and 3 black balls

Asked by admin @ 17/08/2021 in Math viewed by 310 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 297 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 4 red and 6 black balls

Asked by admin @ 13/08/2021 in Math viewed by 318 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 …

An urn contains 5 red and 2 green balls

Asked by admin @ 23/08/2021 in Math viewed by 318 persons

An urn contains 5 red balls and 2 green balls. two balls are drawn one after the other.what is the probability that the second ball is red

An urn contains 5 red and 2 black balls

Asked by admin @ 20/08/2021 in Math viewed by 261 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 …