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Sex Determination in Humans

Find the prob...

Question

Find the probability that a person has less than $2$ cars.

A

\frac{29}{40}

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B

\frac{33}{40}

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C

\frac{37}{40}

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D

\frac{27}{40}

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Solution

The correct option is B $\frac{33}{40}$
$P (P) = \frac{450 + 1200}{2000} = \frac{1650}{2000} = \frac{33}{40}$

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Q. Question 20
A recent survey found that ages of workers in a factory as follows:

\begin{matrix} A g e (i n y e a r s) & 20 - 29 & 30 - 39 & 40 - 49 & 50 - 59 & 60 a n d a b o v e N u m b e r o f & 38 & 27 & 86 & 46 & 3 w o r k e r s \end{matrix}

If a person is selected at random, find the probability that the person is:
(i) 40 years or more.
(ii) Under 40 years.
(iii) Having age from 30 - 39 years.
(iv) Under 60 but over 39 years.

\frac{9}{12} \times \frac{8}{11} \times \frac{- 24}{27} \times \frac{33}{40} = \frac{- 2}{m}

m

The table given below shows the ages of 75 teachers in a school.

Age (in years)	18 – 29	30 – 39	40 – 49	50 – 59
Number of teachers	3	27	37	8

A teacher from this school is chosen at random. What is the probability that the selected teacher is
(i) 40 or more than 40 years old?
(ii) of an age lying between 30 – 39 years (including both)?
(iii) 18 years or more and 49 years or less?
(iv) 18 years or more old?
(v) above 60 years of age?
Note Here 18 – 29 means 18 or more but less than or equal to 29.

Q. Find the probability that person has more than

2

Q. In a test, the marks obtained by

15

34, 37, 44, 39, 45, 46, 35, 42, 48, 40, 39, 33, 43, 47, 44.

The probability that a student chosen at random passed the test, if the passing marks are

40

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