Correct Answer - Option 1 : 63/143
Given
Number of blue pens = 7
Number of red pens = 6
Formula used
P(E) = Number of favourable outcomes/Total number of outcomes
Calculation
Let E is an event of drawing 2 blue pens and 1 red pens
P(E) = (7 C 2 × 6 C 1 )/ 13 C 3
⇒ (21 × 6)/(13 × 22)
⇒ 63/143