Given: Hulk and Thanos each received Easter baskets containing different types of candy. Hulk's basket contained sour candy and chocolate candy in a ratio of 4 to 3 and sour candy to sweet candy in a ratio of 5 to 2. Thanos's basket contained sour candy to chocolate candy in a ratio of 6 to 1.
Asked: If the total number of sour candies in both baskets was between 40 and 50 pieces, which of the following are possible numbers of chocolate candies in Hulk's basket?
Hulk's basket contained sour candy and chocolate candy in a ratio of 4 to 3 and sour candy to sweet candy in a ratio of 5 to 2.
Sour candy : chocolate candy : sweet candy = 20: 15: 8
Let Hulk's basket contained sour candy, chocolate candy and sweet candy 20k , 15k & 8k respectively
Thanos's basket contained sour candy to chocolate candy in a ratio of 6 to 1.
Let Thano's basket contained sour candy and chocolate candy 6m & m respectively
40 < 20k + 6m <50
20 < 10k + 3m < 25
I. 15: 15k = 15; k = 1; 10<3m<15; m = 4; Possible
II. 25: 15k = 25; k = 25/15 ; Not an integer; Not possible
III. 30; 15k = 30; k=2; 0<3m<5; m = 1; Possible
IMO C