Krutika, David and Mark share some sweets in the ratio 2:2:1. Krutika gets 20 more sweets than Mark. How many sweets does David get?

David gets 20 sweets.

Step-by-step explanation:

If you want the ratio, 2:2:1, Krustika gets 20 more than mark, you will need to have double what mark got.

So, the only number I can think of that is half, but also 20 more than the "1" ratio, is 20; as 20 is half of 40, however, 40 is also 20 more than the "1" ratio.

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%