From the selection of 86 movies on a plane, Sandra has seen 13 and Robert has seen 14

MATHEMATICS · Multi-part · CBSE · Mathematics · Sets · Sets

Problem

From the selection of 86 movies on a plane, Sandra has seen 13 and Robert has seen 14. 69 of the movies have been seen by neither. Find the number of movies seen by: (1) both Sandra and Robert (2) Robert but not Sandra.

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