Question

A key to room number $C_3$ is dropped into a jar with five other keys, and the jar is thoroughly mixed. If keys are randomly drawn from the jar without replacement until the key to room $C_3$ is chose, then what are the odds in favour that the key to room $C_3$ will be obtained on the $2^{nd}$ try?

• A. $1:4$
• B. $1:5$
• C. $1:6$
• D. $5:6$

Answer 1

The correct option is B $1:5$

No of keys present in the $2^{nd}$ try = $5$

Favorable outcomes = $1$

Hence, odds in favor = $1:5$