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Standard IX

Mathematics

Experimental/Empirical Probability

1500 families...

Question

1500 families with 2 children were selected randomly, and the following data was recorded
Number of girls in a family 2 1 0
Number of families 475 814 211
The probability of a family, chosen at random, having 1 girl is ...........

\frac{814}{686}

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\frac{814}{475}

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\frac{814}{211}

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\frac{814}{1500}

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Solution

The correct option is D $\frac{814}{1500}$
Total families= 1500 families
Families having 1 girl =814
probability of a family, chosen at random, having 1 girl
$P = \frac{F a m i l i e s h a v i n g 1 g i r l}{T o t a l f a m i l i e s}$
$P = \frac{814}{1500}$
Answer (D) $\frac{814}{1500}$

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Similar questions

1500 families with 2 children were selected randomly and the following data were recorded:

number of girls in a family: 0 1 2

frequency: 211 814 475

Compute the probability of a family, chosen at random, having:

1500

families with

2

children were selected randomly, and the following data were recorded:

No. of girls in a family	$2$	$1$	$0$
No. of families	$475$	$814$	$211$

Compute the probability of a family, chosen at random, having
(i)

2

girls
(ii)

1

girl
(iii) No girl
Also check whether the sum of these probabilities is

1

Q. Question 2 (i)
1500 families with 2 children were selected randomly, and the following data was recorded:

\begin{matrix} N u m b e r o f g i r l s i n a f a m i l y & 2 & 1 & 0 N u m b e r o f f a m i l i e s & 475 & 814 & 211 \end{matrix}

Compute the probability of a family,chosen at random ,having 2 girls.

Question 2 (ii)
1500 families with 2 children were selected randomly, and the following data was recorded:
$\begin{matrix} Number of girls in a family & 2 & 1 & 0 Number of families & 475 & 814 & 211 \end{matrix}$
Compute the probability of a family, chosen at random, having 1 girl.

1500 families with 2 children were selected randomly, and the following data were recorded:

Number of girls in a family	2	1	0
Number of families	475	814	211

Compute the probability of a family, chosen at random, having

(i) 2 girls (ii) 1 girl (iii) No girl

Also check whether the sum of these probabilities is 1.

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1500 families with 2 children were selected randomly, and the following data was recordedNumber of girls in a family210Number of families475814211The probability of a family, chosen at random, having 1 girl is ...........

The correct option is D 8141500Total families= 1500 familiesFamilies having 1 girl =814probability of a family, chosen at random, having 1 girl P=Familieshaving1girlTotalfamiliesP=8141500Answer (D) 8141500

1500 families with 2 children were selected randomly, and the following data was recorded
Number of girls in a family 2 1 0
Number of families 475 814 211
The probability of a family, chosen at random, having 1 girl is ...........

The correct option is D $\frac{814}{1500}$
Total families= 1500 families
Families having 1 girl =814
probability of a family, chosen at random, having 1 girl
$P = \frac{F a m i l i e s h a v i n g 1 g i r l}{T o t a l f a m i l i e s}$
$P = \frac{814}{1500}$
Answer (D) $\frac{814}{1500}$