(a) How many 3 digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9 which are divisible by 5 and none of the digits is repeated? (b) In a group of 6 boys and 4 girls, four children are to be selected. In how many ways can they be selected such that at least one boy should be there
(a) How many 3 digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9 which are divisible by 5 and none of the digits is repeated? (b) In a group of 6 boys and 4 girls, four children are to be selected. In how many ways can they be selected such that at least one boy should be there
Chapter8: Sequences, Series,and Probability
Section8.6: Counting Principles
Problem 58E: Forming an Experimental Group To conduct an experiment, researchers randomly select five students...
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(a) How many 3 digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9 which are
divisible by 5 and none of the digits is repeated?
(b) In a group of 6 boys and 4 girls, four children are to be selected. In how many ways
can they be selected such that at least one boy should be there?
(c) The blood groups of 200 people is distributed as follows: 50 have type A blood, 65
have B blood type, 70 have O blood type and 15 have type AB blood. If a person from
this group is selected at random, what is the probability that this person has O blood
type ?
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