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The following table gives probability distribution of marks obtained by some students in a CAT. Marks (x) 11 16 19 22 24 28 Probability (p)

The following table gives probability distribution of marks obtained by some students in a CAT.

Marks (x) 11 16 19 22 24 28

Probability (p) 0.0811 0.1081 0.1892 0.2432 0.2162 0.1622

What is the probability that a randomly picked student from this class scored

1. More than 22 marks?

2. less than 20.5marks?

3. between 16 and 23 marks exclusive?

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