a bag contains 4 red marbles 6 white marbles and 7 blue marb

Solution

number of ways can 3 red 2 white and 4 blue marbles be chosen from 4 red marbles 6 white marbles and 7 blue marbles

=(⁴c₃)*(⁶c₂)*(⁷c₄)

=(4)*(6*5 /(2*1))*(7*6*5*4/(4*3*2*1))

=2100 ways