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A boy contains 5 pink , 3 blue & 6 black ball. How many solution of ball can be formed by taking at least one ball form the boy1. 157 2. 1873. 167 4. 197 5. 177 |
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Answer» Correct Answer - Option 3 : 167 Given Number of pink balls = 5 Number of blue balls = 3 Number of black balls = 6 Concept Number of ways to select one or more things out of ( x + y + z) things where x are of same type, y are if same type and z are of same type, then number of ways are (x + 1) (y + 1) (z + 1) – 1 Calculation Here x = 5, y = 3 and z = 6 ⇒ (5 + 1) (3 + 1) (6 + 1) – 1 ⇒ (6 × 4 × 7) – 1 ⇒ 168 – 1 ⇒ 167 |
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