Question

a survey asked a group of adults and youths if they prefer reading books printed on paper or electronic books. results are shown in the table below, but some values are missing. fill in the missing values.

book preference

	print	electronic	total
adults
total	59	65

Explanation:

Step1: Calculate the total for youths

The total for youths is the sum of print and electronic preferences for youths.
$$30 + 26=56$$

Step2: Calculate the print preference for adults

The print preference for adults is the total print preference minus the print preference for youths.
$$59 - 30 = 29$$

Step3: Calculate the electronic preference for adults

The electronic preference for adults is the total electronic preference minus the electronic preference for youths.
$$65 - 26=39$$

Step4: Calculate the total for adults

The total for adults is the sum of print and electronic preferences for adults.
$$29+39 = 68$$

Step5: Calculate the grand - total

The grand - total is the sum of the total for youths and the total for adults.
$$56+68 = 124$$

Answer:

	Print	Electronic	Total
Adults	29	39	68
Total	59	65	124