A few days ago
Another Probability question please help?
” A card is drawn form a deck of cards numbered one through twenty. The card is NOT REPLACED and another card is drawn. Find the probability of the outcome”
question 1: two even numbers are drawn in a row
question 2: an even number then an odd number
Please if you can show me how to do math or explain your thinking.
-thanks alot 🙂
Top 2 Answers
A few days ago
Favorite Answer
(1) The probability of drawing an even number off the bat is 10/20. The probability of drawing a second even number is 9/19. Think about it: you’ve already drawn an even card without replacing it, so there are 9 even cards left out of 19 remaining cards.
The probability is (10/20)*(9/19)= 9/38
(2) The probability of drawing an even number is again 10/20. The probability of drawing an odd number, now that there are only 19 remaining cards, is 10/19. Unlike in (1), there are still 10 odd cards left in the deck.
The probability is (10/20)*(10/19)= 5/19
0
A few days ago
A1. 25%
A2. 50%
a1 do a diagram with heads and tails. there are only two kinds of numbers.(2 posibilities)
a2 really easy. 50-50
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