Elective Mathematics

1Three coins are tossed. P(at least two heads) is

2A bag has 4 red and 6 green balls. Two are drawn without replacement. P(both red) is

3The probability of an impossible event is

4P(A) = 0.5, P(B) = 0.4 and P(A ∩ B) = 0.2. Find P(A ∪ B).

5A bag has 3 red and 2 white balls. Two are drawn at random without replacement. P(at least one red) is

6Events A and B are independent with P(A) = 0.5 and P(B) = 0.4. P(A and B) is

7A box has 4 red and 6 blue pens. One is taken at random. P(red) is

8If P(A) = 0.6, P(B) = 0.3 and A and B are mutually exclusive, find P(A or B).

9A fair coin is tossed 3 times. What is the probability of exactly 2 heads?

10Mutually exclusive events cannot