Question

a boy has 2 red balls ,5 blue balls and x yellow balls.if a ball is drawn from the bag without looking into the bag,then the probability of getting a yellow ball is x/10.find the number of yellow balls in the bag and the probability of getting a red ball if the ball is drawn from the bag. please help correct answer will be marked as brainleist

Answer 1

There are 15 balls total. The probability of getting a red ball is  1015  

To find the probability of getting two red balls without replacement:

1015⋅914  

=90210  

=921  

=37  

How I got  914  was that if we took one red ball out, this means we would have 9 red balls left over and 14 total left over. We have to multiply both fractions together.

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