A histogram has classes of equal width $5$. The frequencies of $0$-$5, 5$-$10, 10$-$15, 15$-$20$ are $3, 7,…

A histogram has classes of equal width $5$. The frequencies of $0$-$5, 5$-$10, 10$-$15, 15$-$20$ are $3, 7, 11, 4$. Total observations are:
  1. $22$
  2. $24$
  3. $25$
  4. $28$

Solution

Total $= 3+7+11+4 = 25$.

Asked in: IMO

Practice more DATA HANDLING questions on Aicharya