X2-2x=(-2)(3-x)
Question
Now make the greates and the smalle 4_ digit number by using any one digit twice
(a) 3,8,7
(a) 3,8,7
Of the 200 candidates who were interviewed for a position at a call centre, 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?
