Revision-hour classes $0\le t

Question

Revision-hour classes $0\le t<5$, $5\le t<10$, $10\le t<15$, $15\le t<20$, $20\le t<25$ have frequencies 12,$p$, 28, 8, 12. A partial histogram is shown. Let t be the number of revision hours. $\text{0}$ $\text{5}$ $\text{10}$ $\text{15}$ $\text{20}$ $\text{25}$ $\text{0}$ $\text{4}$ $\text{8}$ $\text{12}$ $\text{16}$ $\text{20}$ $\text{24}$ $\text{28}$ $\text{32}$ $\text{Revision time (h)}$ $\text{Frequency}$

Accepted Answer

(a) $p=20$ (b) remaining bar heights $28,8,12$ (c) $10\le t<15$ h (d) $11.75$ h.

Completing a partial revision-time histogram

Completing a partial revision-time histogram

Solution:

Solution locked