Question

Two digit number are formed from the digits $0,1,2,3,4$ where digits are not repeated. Find the probability for each of the event that the number formed is a prime number.

• A. $\frac{1}{16}$
• B. $\frac{3}{16}$
• C. $\frac{5}{16}$
• D. $\frac{7}{16}$

Answer 1

The correct option is C $\frac{5}{16}$

Sample space$=4\times 4=16$
Nos. is prime nos.$=5(13,23,31,41,43)$
probability$=5/16$