Answer to Question #134472 in Psychology for TM300

Question

Wanda and her sister, Siyabulela entered a lucky draw and can win R250 000 worth of prizes
from a gaming magazine. Wanda sent through 15 entry forms, while Siyabulela sent through 35.
The report from the competition administrators is that 400 entries qualified, and both Wanda and
Siyabulela qualified. Use this information to answer the following questions:
1.1 If Wanda wins first prize, what is the probability that Siyabulela will win second prize? (The
first prize-winning entry is not put back in the container.).
1.2 What is the probability that Wanda and Siyabulela will win first and second prize?

Answer 1

1.1 The probability of Siyabulela to win the rest of the match will be her entry divide by the total minus Wanda's entry

400-15=385

35/385

7/49

1.2 The probability of both girls winning the prize will be summation of their total entries divide by the total entry

This will be 50/400

=1/80