In 50 gm alloy of gold and silver the gold is 80 % by weight. How much gold should be mixed with this alloy so that the weight of gold would become 95 %?

Related Mcqs:

1. The average weight of 25 persons sitting in a boat had some value. A new person added to them whose weight was 46 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 25 persons?

   A. 55 kg
   B. 62 kg
   C. 56 kg
   D. None

2. The average weight of a group of boys is 30 kg. After a boy of weight 35 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally?

   A. 4
   B. 5
   C. 6
   D. 7

3. The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is___________?

   A. 17 kg
   B. 20 kg
   C. 26 kg
   D. 31 kg

4. The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is___________?

   A. 17 kg
   B. 20 kg
   C. 26 kg
   D. 31 kg

5. Atif ordered 16 chapatis, 5 plates of rice, 7 plates of mixed vegetable and 6 ice-cream cups. The cost of each chapati is Rs.6, that of each plate of rice is Rs.45 and that of mixed vegetable is Rs.70. The amount that Atif paid the cashier was Rs.961. Find the cost of each ice-cream cup?

   A. Rs.25
   B. Rs.22.50
   C. Rs.20
   D. Rs.17.50
   E. None of these

6. The cost of Type 1 rice is Rs. 15 per kg and Type 2 rice is Rs. 20 per kg. If both Type 1 and Type 2 are mixed in the ratio of 2 : 3, then the price per kg of the mixed variety of rice is:_______?

   A. Rs. 18
   B. Rs. 18.50
   C. Rs. 19
   D. Rs. 19.50

7. Two kinds of rice, 1st costs Rs.13 per kg and 2nd costs Rs.19 per kg are mixed together. Find the ratio in which the 2 types are mixed so that the mixture costs Rs.14.2 per kg?

   A. 3:1
   B. 4:1
   C. 3:4
   D. 4:3

8. Fresh grapes contain 80 % water dry grapes contain 10 % water. If the weight of dry grapes is 250 kg. What was its total weight when it was fresh?

   A. 1000 kg
   B. 1100 kg
   C. 1125 kg
   D. 1225 kg

9. A dishonest dealer professes to sell goods at the cost price but uses a false weight and gains 25%. Find his false weight age?

   A. 700 gms
   B. 750 gms
   C. 800 gms
   D. 850 gms

10. A dishonest dealer professes to sell his goods at Cost Price but still gets 20% profit by using a false weight. What weight does he substitute for a kilogram?

    A. 855 1/2 grams
    B. 833 1/3 grams
    C. 833 1/2 grams
    D. 875 2/7 grams