exam Maths Puzzle

Of the 200 candidates who were interviewed for a position at a call center, 100 had a two-wheeler, 70 had a credit card and 140 had a mobile phone. 40 of them had both, a two-wheeler and a credit card, 30 had both, a credit card and a mobile phone and 60 had both, a two wheeler and mobile phone and 10 had all three. How many candidates had none of the three?

Read Solution (Total 3)

10 candidates have none of the three.

10 had all the three.
50 had T+M but not card.
30 had T+C but not mobile.
20 had M+C but not two wheeler.
10 had two wheeler only.
60 had mobile only.
10 had card only.

so balance 10 had none of the three.
11 years agoHelpfull: Yes(2) No(0)

20 had none of the three...
200-[40+10+50+20+60]=20
11 years agoHelpfull: Yes(1) No(1)
200-x=100+70+140-40-30-60+10.
then x=10.
9 years agoHelpfull: Yes(1) No(1)

exam Other Question

In a class of 120 students numbered 1 to 120, all even numbered students opt for Physics, whose numbers are divisible by 5 opt for Chemistry and those whose numbers are divisible by 7 opt for Math. How many opt for none of the three subjects? In a class of 40 students, 12 enrolled for both English and German. 22 enrolled for German. If the students of the class enrolled for at least one of the two subjects, then how many students enrolled for only English and not German?