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22 May 2018, 10:50
Kudos
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
81% (00:59) correct
19%
(01:19)
wrong
based on 361
sessions
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A bag contains 6 red marbles and 4 white marbles. Alpha selects a marble from the bag at random, records its color and places it back in the bag. Then, Navarro selects a marble from the bag at random. What is the probability that Alpha and Navarro both select white marbles.
1. 4/25
2. 9/25
3. 2/5
4. 3/5
5. 4/5
1. 4/25
2. 9/25
3. 2/5
4. 3/5
5. 4/5
22 May 2018, 11:01
Kudos
Bookmarks
QZ
P(both are white) = P(1st marble is white AND 2nd marble is white
= P(1st marble is white) x P(2nd marble is white)
= 4/10 x 4/10
= 16/100
= 4/25
Answer: A
Cheers,
Brent
01 Jun 2018, 23:46
Kudos
Bookmarks
QZ
Total marbles = 10
White marbles = 4
Required outcome = 4/10 * 4/10
4/25
(A)
