Question

Amna ordered 500 beads. 25% of them are yellow. Amna claimed that she has 5 yellow beads. Is she correct? Justify your answer

Answer 1

Step-by-step explanation:

There are 12 balls in a bag. 3 of them are red, 4 of them are green, and 5 of them are blue. We randomly take out 3 balls from the bag at the same time. What is the probability that all three balls are of the same colour?

My answer: (3/12)3+(4/12)3+(5/12)3. Is this correct?

EDIT: My explanation is that since there are the odds of getting a red ball are 3/12, I simply multiplied it 3 times since I consider multiplication to be the "and" operator. Similarly, I consider addition to be the "or" operator. So, the way I think of it is:

(1 red and 1 red and 1 red) or (1 green and 1 green and 1 green) or (1 blue and 1 blue and 1 blue).