Question

2. A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball at random from the bag is three times that of a red ball, find the number of blue balls in the bag?

Answer 1

Answer:

ANSWER

Let number of blue balls =x 

Total number of balls =5+x 

Probability for a red ball =x+55

 Probability for a blue ball =5+xx 

According to the question 

 5+xx=2(x+55)⇒x=10 ∴

  Number of blue balls=10.

December 26, 2019

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Answer 2

Step-by-step explanation:

3*5=15

THEREFORE 15 BLUE BALLS ARE THERE IN THE BAG