STEP 1:
Find how many megabytes per picture
=528 megabytes ÷ 246 pictures
=2.1463414634 megabytes per picture
STEP 2:
Find # of megabytes for 35 pictures
=2.146 per pic * 35 pics
=75.1219512195 or rounded to 75 mb
ANSWER: 35 pictures use about 75 mb (or 75.1219512195 mb)
Hope this helps! :)