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?

10

Step-by-step explanation:

Let number of blue balls =x

Total number of balls =5+x

Probability for a red ball = x+5/5

Probability for a blue ball =5+x/x

According to the question 5+x/x=2( x+5/5)⇒x=10 ∴

 Number of blue balls=10.

15

Step-by-step explanation:

Total # of balls = red+blue. Three times = 3× redballs(5), hence 3 × 5 = 15

Here is some for finding the difference between the mean and median.to find the mean, you have to add up all the values in the dot plot. then, divide by the total number of plots.to find the median, you have to find the middle value in the dot plot.to find the difference between the two, just subtract them.