Find 10% less than Rs 150.

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Solution

10% less than Rs. 150 means 150 minus 10% of 150.
That is, 150 - {(10/100) × 150} = 150 - (1500/100) = 150 - 15 = Rs. 135.

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Given below is frequency distrigution of wages (in Rs ) of 30 workers in certain factory:

$\begin{matrix} Wages (in Rs) & 110 - 130 & 130 - 150 & 150 - 170 & 170 - 190 & 190 - 210 & 210 - 230 & 230 - 250 No.of workers & 3 & 4 & 5 & 6 & 5 & 4 & 3 \end{matrix}$

A worker is selected at random. Find the probability that his wages are:

(i) less than $R s . 150$ (ii) at least $R s . 210$ (iii) more than or equal to $150$ but less than $R s . 210$ .

Q. Compute the median for each of the following data:

(i)Marks	No. of students	(ii)Marks	No. of students
Less than $10$	$0$	More than $150$	$0$
Less than $30$	$10$	More than $140$	$12$
Less than $50$	$25$	More than $130$	$27$
Less than $70$	$43$	More than $120$	$60$
Less than $90$	$65$	More than $110$	$105$
Less than $110$	$87$	More than $100$	$124$
Less than $130$	$96$	More than $90$	$141$
Less than $150$	$100$	More than $80$	$150$

Q. Given below is the frequency distribution of wages (in Rs) of 30 workers in a certain factory:

Wages (in Rs)	110-130	130-150	150-170	170-190	190-210	210-230	230-250
No. of workers	3	4	5	6	5	4	3

A worker is selected at random. Find the probability that his wages are:
(i) less than Rs 150
(ii) at least Rs 210
(iii) more than or equal to 150 but less than Rs 210.

Q. The minimum cost of each tablet is Rs. 10 and each capsule is Rs. 10. If the cost of 8 tablets and 5 capsules is not less than Rs. 150, frame the inequations for the given data.

Q. Compute the median for each of the following data:

(i)

Marks	No. of students
Less than 10 Less than 30 Less than 50 Less than 70 Less than 90 Less than 110 Less than 130 Less than 150	0 10 25 43 65 87 96 100

(ii)

Marks	No. of students
More than 150 More than 140 More than 130 More than 120 More than 110 More than 100 More than 90 More than 80	0 12 27 60 105 124 141 150

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Find 10% less than Rs 150.

10% less than Rs. 150 means 150 minus 10% of 150. That is, 150 - {(10/100) × 150} = 150 - (1500/100) = 150 - 15 = Rs. 135.

10% less than Rs. 150 means 150 minus 10% of 150.
That is, 150 - {(10/100) × 150} = 150 - (1500/100) = 150 - 15 = Rs. 135.