To calculate the probability of drawing an O twice without replacement, we need to find the probability of drawing an O on the first draw and then drawing another O on the second draw.
The total number of ways to draw two letters from the word SCHOOL is 6 choose 2, which is equal to 6! / (2! * 4!) = 15.
The number of ways to draw an O on the first draw is 1, and the number of ways to draw an O on the second draw is also 1.
So, the probability of drawing an O twice is 1/15.
Therefore, the answer is:
B) 1/15
Krishna puts the letters of the word SCHOOL on pieces of paper and puts the pieces in a bag. He draws two letters without looking. The first piece of paper is NOT REPLACED before the second piece is drawn. What is the probability that Krishna draws an O twice?
A)1/18
B)1/15
C)2/15
D)1/36
1 answer