- There are two names given JOHNSON and TONY. If one letter is picked from both simultaneously at random, then find the probability that the letter is same?
JOHNSON = 2/7 (if I pick O)
TONY= ¼ (if I pick O)
Total probability of picking O = 2/7 + ¼
JOHNSON = 2/7( if I pick N)
TONY = ¼ ( if I pick N)
Total probability of picking N = 2/7 + ¼
Probability of that the letter is same
= Total probability of picking O * Total probability of picking N
= (2/7 + ¼)*(2/7 + ¼)
For details, see the video https://youtu.be/b6lbcfMcaF4