Question

A box contains 20 cards numbered 1–20. You select a card. Without replacing the first card, you select a second card. Find P(1, then 20).
1. 1/190

2. 1/400

3. 1/200

4. 1/380

Answer 1

Hi there!

First, you select a random card. You have a 1/20 chance of selecting any card. Then, without replacing the first card, you draw a second card. You have a 1/19 chance of selecting any card. In order to find the chance of both, you'll need to multiply the fractions together, giving you the 1/380 chance.

ANSWER:
Option 4 - 1/380


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