GATE 2022 PI – Question 7

General Aptitude · Quantitative Aptitude: Data Interpretation, Arithmetic and Number Computation · 2 marks · Multiple choice

Each shown disk has eight equally likely outcomes 1–8. Two arrows are spun independently. Find the probability that the resulting numbers sum to 8.

1/16
5/64
3/32
7/64

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Show answer and explanation

Correct answer: (D) 7/64

Explanation

There are 8 × 8 = 64 equally likely ordered pairs. Favorable pairs are (1,7),(2,6),(3,5),(4,4),(5,3),(6,2),(7,1), seven in total. Probability = **7/64, D**.

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