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Sambhaji Maharaj

89× 29=80+90×...

Question

$89 \times 29 = (80 + 90) \times (20 + 9)$

A

True

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B

False

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Solution

The correct option is B False

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Q. Compute quartile deviation for each of the following tables.

Class interval	frequency
$1 - 9$	$4$
$10 - 19$	$3$
$20 - 29$	$20$
$30 - 39$	$12$
$40 - 49$	$5$
$50 - 59$	$8$
$60 - 69$	$14$
$70 - 79$	$27$
$80 - 89$	$2$
$90 - 99$	$5$

Q. Calculate mode of the following distribution:

Marks	10−19	20−29	30−39	40−49	50−59	60−69	70−79	80−89	90−99
Number of Students	29	87	181	247	263	133	40	9	2

Q. Find out the Mode from any of the following two distributions:
(a)

X	:	30-40	40-50	50-60	60-70	70-80	80-90	90-100
f	:	6	10	16	14	10	5	2

Marks	:	0-9	10-19	20-29	30-39	40-49
No of candidates	:	6	29	87	181	247
Marks	:	50-59	60-69	70-79	80-89	90-99
No of candidates	:	263	113	49	9	2

14, 19, 29, 49, 89, ?

Q. sin (50° + θ) – cos (40° – θ) + tan 1° tan 10° tan 20° tan 70° tan 80° tan 89°

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