Find the number of blue balls in the jar.
NCERT Class 10 math’s Chapter 15
Page No. 312
Exercise 15.2
Question 5
A jar contains 24 marbles, some are green and others are blue. If a marble is drawn at random from the jar, the probability that it is green is 2/3.
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Total number of marbles = 24
Let the total number of green marbles be x.
Then, total number of blue marbles 24 – x
P (getting a given marble) = x/24
According to the condition given in the question,
x/24 = 2/3
⇒ x = 16
Therefore, total number of green marbles in the jar = 16
Hence, total number of blue marbles = 24 – x = 24 – 16 = 8