a bag contains 5 green 4 blue and 7 yellow balls 3 balls is drawn at random
Answers
Answered by
0
There are two ways it can happen - you draw a red ball, then a green one - or the other way around.
total number of balls
The chance to draw a red ball first is 5 in 16, then the chance that you get a green ball next is 7 in 15. So you have a 35 in 240 chance.
The chance to draw them in the other order is 7 in 16 followed by 5 in 15 - this is also 35 in 240.
So the total chance is 70 in 240 - or 7 in 24 - or about 29%.
Similar questions