exam Maths Puzzle Numerical Ability

If 3 balls are drawn at random from a bag containing 3 red and 4 blue balls, what is the expected number of red balls in the sample?

Read Solution (Total 0)

exam Other Question

please help me with x.x.y.y.x.4 x=2y=1 tickets for homecoming dance cost $20 for a single ticket or $35 for a couple. ticket sales totaled $2280, and 128 people attende. how many tickets of each type were sold?