Answer :

Sample Space consists of 50 different people where 1 person can only have 1 blood group.

∵ number of people with “O” blood is 21

∴ ---- (1)

Similarly,

Probability of getting Blood “B”, “A”, “AB” respectively is

---- (2)

---- (3)

---- (4)

By (1)

(i) Probability that random person among those people has “O” group = (by (1))

(ii) Probability that random person among those people does not has “B” group = (by (2))

(iii) Probability that random person among those people has “A” group = (by (3))

(iv) Probability that random person among those people does not has “B” group = (by (4))

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