Question

When a certain type of thumbtack is flipped the probability of its landing tip up (U) is 0.52 and the probability of its landing tip down (D) is 0.48. Suppose you flip two such thumbtacks, one at a time. The probability distributor the possible outcome of these flips is shown below.
A. Find the probability of getting 0 ups, 1 ups, when flipping two thumbtacks

Answer 1

Given:
Probability of landing tip up (U) 0.52
Probability of landing tip down(D) 0.48

two thumbtacks:
Probability of getting 0 up, meaning 2 downs.:   0.48 * 0.48 = 0.2304
Probability of getting 1 up, meaning also getting 1 down:  0.52 * 0.48 = 0.2496

Addt'l
Probability of getting 2 ups, no down: 0.52 * 0.52 = 0.2704