Question

The number of ways of selecting one or more letters from the letters AAAA BBB CDE is

• A. 160
• B. 159
• C. 158
• D. 144

Answer 1

The correct option is B 159

$A^4{B}^{3}CDE$ $\therefore$ required number of ways = (4+1)(3+1) (1+1)(1+1)(1+1)–1 = 160–1 = 159