Joanna is reading a storybook. The ratio of the number of pages she read
to the pages that remain to be read is
7:3. If the book contains 500 pages in
all, how many pages did Joanna read?

350

Step-by-step explanation:

Let 7:3 be 7x and 3x respectively. Given,

7x + 3x = 500

10x = 500

x = 50

:. 7x = 7 × 50 = 350

for a it would be 24 children.

for b i don't understand the question. is it saying for each individual person they pick 5 reds to 7 greens or is it the whole group. clarify and i hope this can you.

step-by-step explanation: