A box has 6 black, 4 red, 2 white and 3 blue shirts. When 2 shirts are picked randomly, what is the probability that either both are white or both are blue?
A. $$\frac{{4}}{{105}}$$
B. $$\frac{{1}}{{35}}$$
C. $$\frac{{1}}{{105}}$$
D. $$\frac{{1}}{{15}}$$
Answer: Option A
Solution(By Examveda Team)
Both white or both blueTotal shirts = 15
There are 2 white and 3 blue shirts
Probability for 2 white shirts $$ = \frac{2}{{15}} \times \frac{1}{{14}} = \frac{1}{{105}}$$
Probability for 2 blue shirts $$ = \frac{3}{{15}} \times \frac{2}{{14}} = \frac{1}{{35}}$$
Total Probability $$ = \frac{1}{{105}} + \frac{1}{{35}} = \frac{4}{{105}}$$
Related Questions on Probability
A. $$\frac{{1}}{{2}}$$
B. $$\frac{{2}}{{5}}$$
C. $$\frac{{8}}{{15}}$$
D. $$\frac{{9}}{{20}}$$
A. $$\frac{{10}}{{21}}$$
B. $$\frac{{11}}{{21}}$$
C. $$\frac{{2}}{{7}}$$
D. $$\frac{{5}}{{7}}$$
A. $$\frac{{1}}{{3}}$$
B. $$\frac{{3}}{{4}}$$
C. $$\frac{{7}}{{19}}$$
D. $$\frac{{8}}{{21}}$$
E. $$\frac{{9}}{{21}}$$
What is the probability of getting a sum 9 from two throws of a dice?
A. $$\frac{{1}}{{6}}$$
B. $$\frac{{1}}{{8}}$$
C. $$\frac{{1}}{{9}}$$
D. $$\frac{{1}}{{12}}$$
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