Question 937493
1 = P(A or B) + P(both) + P(neither)
P(A or B) = 1 -P(both) - P(neither) = 1 - .5 - .1 = .4
.......
P(A or B) = P(A) + P(B) - P(A and B)
  .4 = .75 + P(hindi) - .5
.15 = P(hindi)