
Concept explainers
To find: The number of students having neither blue eyes nor brown hair.

Answer to Problem 58STP
The number of students having neither blue eyes nor brown hair are 4.
Explanation of Solution
Given information:In a class of 25 students, 6 have blue eyes, 15 have brown hair and 3 have blue eyes and brown hair
Calculation: Since the number of students having blue eyes and brown hair are also counted with the number of students separately having blue eyes and brown hair. Therefore, the number of students who have neither blue eyes nor brown hair are evaluated as,
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