A hint to get started
Account for the first red ball being removed
A funfair player draws coloured balls from a box containing five blue and two red balls. To win, the player must pick two red balls consecutively. Each blue ball drawn is replaced and drawing continues; each red ball is not replaced. Calculate the probability of winning. marks
[2014/SRJC/II/5(c)]
CJC · Review problems · Question 7
Only blue draws leave the initial box unchanged.