Q24. The average age of 4 sisters is 15 years. If their mother is included, the average age of the group becomes 20 years. What is the mother's age?Mathematics — Arithmetic — Question 24 of 449A. 50 yearsB. 45 yearsC. 35 yearsD. 40 yearsPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →