Question
Mathematics Question on Probability
A bag contains 10 red beads (R)and 5 black beads (B). A bead is taken out of the bag at random, its color is noted and then it is not placed back in the bag. Calculate the probability that first two beads are red.
A
4/7
B
5/7
C
1/3
D
3/7
Answer
3/7
Explanation
Solution
The correct answer is(D): 3/7