Q4. A bag only contains black counters and white counters.
A counter is chosen from the bag at random and replaced.
Another counter is then chosen from the bag at random.
The probability of choosing two black counters is 0.36
(a)
Show that the probability of choosing a black counter each time is 0.6
(b)
Work out the probability of choosing two white counters.

Acircle has the equation (x-2)^2 +y^2 =5. what are the coordinates of the circle's center?

Powerful women's group has claimed that men and women differ in attitudes about sexual discrimination. a group of 50 men (group 1) and 40 women (group 2) were asked if they thought sexual discrimination is a problem in the united states. of those sampled, 11 of the men and 19 of the women did believe that sexual discrimination is a problem. if the p-value turns out to be 0.035 (which is not the real value in this data set), then at = 0.05, you should fail to reject h0. at = 0.04, you should reject h0. at = 0.03, you should reject h0. none of these would be a correct statement.

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.