- A29
- B24
- C39
- D80
Step-by-Step Solution
At least two = exactly two + all three . 24 forgets the centre, 39 adds the centre once for every pair, and 80 is the number who know exactly one.
Answer: A) 29
The engineers of a Bengaluru start-up listed the programming languages they know. How many of them know at least two of the three languages?
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