Page 81 - Mathematics Class - X

OBSERVATIONS
1. Each group will complete the following table

∑ 2 a ∑ 3 a ∑ 4 a ∑ 5 a
a 1 = , a + a 2 = i = 1 i = , i = 1 i = , i = 1 i = , i = 1 i = ,
1
50 100 100 150 200 250

6 7 8 9 10
∑ a i ∑ a i ∑ a i ∑ a i ∑ a i
i = 1 = , i = 1 = , i = 1 = , i = 1 = , i = 1 = ,
300 350 400 450 500

and same for b's, c's , ....... f 's
i i i

2. Experimental probability of 1 = Experimental probability of 2 =
500 500

Experimental probability of 3 = Experimental probability of 4 =
500 500

Experimental probability of 5 = Experimental probability of 6 =
500 500

Experimental probability of 1 is nearly equal to theoretical ________.

Experimental probability of 2 is ________ to theoretical _________.

Experimental probability of 6 is _____ to _______ probability.

INFERENCE
1
The experimental probability of each number 1, 2, 3, 4, 5 and 6 is very close to the theoretical probability .
6

EXTENDED TASK
1. Find the probability of a head while tossing a coin.
2. Determine experimental probability of getting even numbers by throwing a die 500 times and compare them
with their theoretical probabilities.

APPLICATION
Probability is used extensively in the fields like physical sciences, commerce, biological sciences, medical
sciences, weather forecasting, etc.

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