Question 437581
No Venn Diagrams needed here, just the General addition law for counting:

N(m U e U s) = N(m) + N(e) + N(s) - N(me)- N(sm) - N(se) + N(mes) = 21 + 15 + 26 - 3 - 8 - 6 + 2 = 47 students are taking exactly one of science, math, or English.

55 - 47 = 8 are not taking any science, math, or English.