Of the 400 candidates who were interviewed for a position at a call center, 200 had a laptop, 140 had a calculator and 280 had a mobile phone. 80 of them had both, a laptop and a calculator, 60 had both, a calculator and a mobile phone and 120 had both, a laptop and mobile phone and 20 had all three. On the basis of above information answer the following questions.
QUESTION 1 How many candidates who attended the interview had at least one of the three gadgets?
QUESTION 2 How many candidates had none of the three?
QUESTION 3 How many candidates have only laptops?
Answers
Answered by
0
Answer:
80,320,40 (not confirmed)
Step-by-step explanation:
candidates who had only laptop
= HCF[ (200-80) ,(200-120)]
= 40
candidates who had only computer
= HCF[140-80 ,140-60] = 20
candidates who had only mobile phone
= HCF[ 280-60 ,280 - 120] = 20
and those who had all 3 = 20 (given)
(1) at least 1 of the 3 gadgets
= 40+20+20 = 80
(2) none of 3 = 400-80 = 320
(3) have only laptops = 40
Similar questions