Algebra Q#10

0. Average age of a group of five students is 14 yr. If a new student also admitted the group, new average age becomes 13 yr. Find the age of new student.

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Option : D
Explanation : Average age of five students = 14 :. Sum of ages of five students = 14 x5 =70 Again, average age of six students = 13 :. Sum of ages of six students = 13 x 6 =78 Thus, age of new student = 78 - 70 = 8 yr

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