PROBABILITY SOLVED PROBLEMS 1

1. 2/9

2. 1/2

3. 1/3

4. 1/8

2/9

Total number of balls in the basket=2+3+4=9

Number of balls that are red=2

probability of picking the red ball

=2/9

1. 2/6

2. 1/2

3. 1/6

4. 1/3

1/6

Total possibilities in a throw of dice is 6

Total even numbers in a throw would be 2,4,6

Only six is an even number divisible by 3

Probability is

1/6

1. 1/4

2. 2/3

3. 1/2

4. 1/8

1/8

The probability of getting a head is 1/2

We are looking for a probability of heads AND heads AND heads

1/2x1/2x1/2

=1/8

1. 1/4

2. 1/2

3. 3/4

4. 1/8

1/2

The probability of getting a head or tail in a toss of a coin is 1/2

The probability of getting a head or tail would be

head AND tail OR tail AND head

1/2x1/2+1/2x1/2

1/4+1/4

2/4=1/2

1. 9/38

2. 1/2

3. 12/37

4. 20/90

9/38

In th first 20 numbers there are 10 odd and 10 even numbers

Product of two odd numbers will be odd

Pick an odd number then pick another odd number

10/20x9/19=

9/38

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