Total number of boys = 150 - total number of girls = 150-89 = 61
Boys with electronic tablets = 61 - 35 -7 - 4 = 15
Total # of kids with electronic tablets = 15 +11 = 26
Total # of kids with laptops = 53 + 35 = 88
61 boys answered the survey which is 35 more than the 26 who own an electronic tablet