Probability Equation Questions

There are 4 red counters and $x\,$ blue counters in a bag.

2 counters are removed from the bag at random.

The probability that both the counters taken are blue is $13\displaystyle \frac{1}{3}$

Work out the value of $x$ .

[6]

There are 4 red counters and $x\,$ blue counters in a bag.

2 counters are removed from the bag at random.

The probability that both the counters taken are blue is $13\displaystyle \frac{1}{3}$

Work out the value of $x$ .

[6]

Probability Equation Questions Questions