AP EAMCET20228 Jul 2022Morning ShiftMathematicsPermutation and CombinationActual
A question paper consists of two sections having 3 and 4 questions respectively. The following note is given on the paper. "It is not necessary to attempt all the questions. One question from each section is compulsory". In how many ways can a candidate select the questions?
Options
- A105
- B210
- C27
- D25
Correct answer
A. 105
Step-by-step solution
Number of ways of selecting one or more than one question from section A=2^3-1=7 And number of ways of selecting one or more than one question from section B=2^4 1=15 Total ways of section =7 15=105