323-55-971-251-56-61-

The correct option is B 21Here, the terms of the given expression can also be written as or 330/55×1000/250×60/60=? or ? = 6 × 4 × 1 = 24 ≈ 21 [because we inc ...

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Byju's Answer

Standard VII

Mathematics

Properties of Multiplication of Integers

323/55×971/25...

Question

$\frac{323}{55} \times \frac{971}{251} \times \frac{56}{61} = ?$

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Solution

The correct option is E 21
Here, the terms of the given expression can also be written as
or $\frac{330}{55} \times \frac{1000}{250} \times \frac{60}{60} = ?$
or $? = 6 \times 4 \times 1 = 24 \approx 21$
[because we increase the value of 323 and 971 upto 330 and 1000, respectively].

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Question 4

The range of the data 30, 61, 55, 56, 20, 26, 46, 28, 56 is

(a) 26

(b) 30

(d) 61

Q. Evaluate:

{(5^{2} \times {(- 3)}^{2})}^{3} \times \frac{1}{{(- 3)}^{6} \times 5^{6}}

Q. Prepare a discrete series from the following data:

62	50	57	58	51	53	62	64	60	61
60	51	64	55	55	52	60	65	58	60
59	52	63	56	56	58	64	63	62	60

Calculate the mean, median and standard deviation of the following distribution :

$\begin{matrix} t e x t C l a s s - i n t e r v a l : & 31 - 35 & 36 - 40 & 41 - 45 & 46 - 50 & 51 - 55 & 56 - 60 & 61 - 65 & 66 - 70 Frequency : & 2 & 3 & 8 & 12 & 16 & 5 & 2 & 3 \end{matrix}$

Q. By taking classes

30 - 40, 40 - 50, 50 - 60, . . .

, construct a frequency table for the following data:

65, 34, 74, 49, 52, 35, 71, 55, 61, 40, 56, 38, 52, 56, 52, 33, 60, 35, 49, 37, 53, 50, 44, 30, 62, 50, 47, 45, 47, 50, 63, 61, 54, 58, 47, 64, 37, 38, 44, 42, 47, 55, 70, 33, 75, 49, 47, 30, 60, 69

Also, construct a combined histogram and frequency polygon for the distribution.

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62	50	57	58	51	53	62	64	60	61
60	51	64	55	55	52	60	65	58	60
59	52	63	56	56	58	64	63	62	60

62	50	57	58	51	53	62	64	60	61
60	51	64	55	55	52	60	65	58	60
59	52	63	56	56	58	64	63	62	60

32355×971251×5661=?

The correct option is E 21Here, the terms of the given expression can also be written as or 33055×1000250×6060=? or ?=6×4×1=24≈21 [because we increase the value of 323 and 971 upto 330 and 1000, respectively].

$\frac{323}{55} \times \frac{971}{251} \times \frac{56}{61} = ?$

The correct option is E 21
Here, the terms of the given expression can also be written as
or $\frac{330}{55} \times \frac{1000}{250} \times \frac{60}{60} = ?$
or $? = 6 \times 4 \times 1 = 24 \approx 21$
[because we increase the value of 323 and 971 upto 330 and 1000, respectively].

62	50	57	58	51	53	62	64	60	61
60	51	64	55	55	52	60	65	58	60
59	52	63	56	56	58	64	63	62	60