(5) In a group of 25 students, 18 study French, 12 study German and 5 study neither French nor German. If a student is c

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5 In A Group Of 25 Students 18 Study French 12 Study German And 5 Study Neither French Nor German If A Student Is C 1 (128.44 KiB) Viewed 10 times

(5) In a group of 25 students, 18 study French, 12 study German and 5 study neither French nor German. If a student is chosen at random, what is the probability that the student studies: (a) French only? (b) German only? (c) French or German or both ? (d) both French and German ? (6) A box has same sized marbles of red, white and blue colors. If a marble is drawn out at random, the probability that it is red is the same as the probability that it is white and twice the probability that it is blue. (a) What is the smallest number of marbles that the box could have? (b) Using the value in part (a) what is the probability that a marble chosen at random is: (i) red? (ii) white? (iii) red or white ? (iv) not blue ? (7) A survey of a certain district showed that 6% of families have one child, 38% have two children, 42% have three children and 10% have more than three children. A family is selected at random. What is the probability that there are: (a) some children? (b) no children?