1. First ball was red
No. of red balls: 2
Total number of balls:5
2. First ball was white
No. of white balls: 3
Total number of balls: 5
3. Second ball was red:
The probability is given by
Now we'll calculate P(R,R)
After the first red, there is one more red left, and four balls altogether, therefore
Probability of the second ball being red is
Answer this Question
Math - A bag contains 5 red balls and 4 white balls. Two balls are drawn at ...
Math - A bag contains 5red balls and 4 white balls. Two balls are drawn at ...
math - A box contains three white balls and two red balls. A ball is drawn at ...
MATH(STATISTICS) - Urn A contains R red balls and W white balls, urn B contains ...
Math - "In vase A, there are 3 red balls and 5 white balls. In vase B, there are...
Math - A box contains 2 white calls and 7 pink balls. Two balls are drawn at ...
math - a. A box contains three white balls and two red balls. A ball is drawn at...
statistics - An Urn contains 7 red and 3 white balls. Two balls are drawn in ...
MATH - Urn A contains six white balls and three black balls. Urn B contains ...
probability - there are 4 white balls and 6 red balls in a sack. If two balls ...