200 people were surveyed to see which of the four mentioned snacks below that people prefer- The data is as shown in the table- array - c - c -Burger - 74 illhlinelendarrayWhat is the probability that a personi prefers ice creamii does not prefer ice cream-iii are i and ii complementary- - 1 MARK-

Concept: 0.5 Mark Solution: 0.5 Mark Probability that a person prefers ice cream = 34/200 = 0.17. Probability that a person does not prefer ice cream = 1 – 0. ...

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Standard VII

Mathematics

Experimental Approach to Probability

200 people we...

Question

200 people were surveyed to see which of the four mentioned snacks below that people prefer. The data is as shown in the table.

$\begin{matrix} Snack & Number of people Pizza & 42 Sandwich & 50 Burger & 74 Ice cream & 34 \end{matrix}$

What is the probability that a person

(i) prefers ice cream
(ii) does not prefer ice cream.
(iii) are (i) and (ii) complementary? [ 1 MARK]

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Solution

Concept: 0.5 Mark
Solution: 0.5 Mark

Probability that a person prefers ice cream = $\frac{34}{200}$ = 0.17.
Probability that a person does not prefer ice cream = 1 – 0.17 = 0.83.
The two events are complementary because every outcome is a part of exactly one of the two events.

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Concept: 0.5 Mark Solution: 0.5 Mark Probability that a person prefers ice cream = 34200 = 0.17. Probability that a person does not prefer ice cream = 1 – 0.17 = 0.83. The two events are complementary because every outcome is a part of exactly one of the two events.

Concept: 0.5 Mark
Solution: 0.5 Mark

Probability that a person prefers ice cream = $\frac{34}{200}$ = 0.17.
Probability that a person does not prefer ice cream = 1 – 0.17 = 0.83.
The two events are complementary because every outcome is a part of exactly one of the two events.