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Standard VII

Mathematics

Experimental Approach to Probability

Four friends ...

Question

Four friends named Ravi, Suresh, Rani, Geetha put their names in a box. A name is picked at random. The probability of getting a boy's name is $\frac{1}{4}$ .

True

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False

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Solution

The correct option is B
False

Total number of names = 4

Favourable outcome ( Number of cards with boy's name) = Ravi, Suresh

= 2

$Probability to get a boy's name = \frac{Number of boys}{Total number of names}$

$= \frac{2}{4}$

$= \frac{1}{2}$

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Four friends named Ravi, Suresh, Rani, Geetha put their names in a box. A name is picked at random. The probability of getting a boy's name is 14.

The correct option is B False Total number of names = 4 Favourable outcome ( Number of cards with boy's name) = Ravi, Suresh = 2 Probability to get a boy's name= Number of boysTotal number of names = 24 = 12

Four friends named Ravi, Suresh, Rani, Geetha put their names in a box. A name is picked at random. The probability of getting a boy's name is $\frac{1}{4}$ .

The correct option is B
False

Total number of names = 4

Favourable outcome ( Number of cards with boy's name) = Ravi, Suresh

= 2

$Probability to get a boy's name = \frac{Number of boys}{Total number of names}$

$= \frac{2}{4}$

$= \frac{1}{2}$