Question

Questions

1. There are 30 students in a class: 16 boys and 14 girls. What is the probability that a boy will be chosen at random?
2. A bag contains 3 green marbles, 6 blue marbles and 6 red marbles. One marble is taken out of the bag at random.
What is the probability of choosing:
(1) a red marble?
a
(11)
a green marble?
3.
(a) What is the probability of choosing the letter B at random from the word ALPHABET?
+

Answer 1

1: 8/15

2: a: 2/5

b: 1/5

3: 1/8

Explanation:

1:

16/30 chance

simplify

8/15

2:

3 + 6 + 6 = 15

red: 6/15 --> 2/5

green: 3/15 --> 1/5

3:

1/8

Answer 2

1. 8/15

2. Green marble: 3/15

Red Marble: 6/15

Blue marbles: 6/15

3. a 1/8