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Combination

A 1 +1 B B ...

Question

$A 1$
$+ 1 B - --- -$
$B 0 - --- -$
Find $A + B$ .

16

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15

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18

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12

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Solution

The correct option is D $16$
$A 1 + 1 B = B 0, (10 A + 1) + (10 + B) = 10 B + 0, 1 + B = 0, n o t p o s s i b l e, 1 + B = 10, B = 9, (10 A + 1) + (10 + 9) = (90 + 0) 10 A = 70, A = 7$

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Similar questions

A 1

+ 1 B - ---- -

B 0 - -- -

Group	$6 - 8$	$8 - 10$	$10 - 12$	$12 - 14$	$14 - 16$	$16 - 18$	$18 - 20$
Frequencies	$12$	$20$	$16$	$15$	$17$	$8$	$12$

9 - [16 - {18 - (15 - 12)}] = ?

A = {3, 6, 9, 12, 15, 18, 21, 24}

B = {4, 8, 12, 16, 20, 24}

A ∖ B

B ∖ A

A = {3, 6, 9, 12, 15, 18, 21}; B = {4, 8, 12, 16, 20}

C = {2, 4, 6, 8, 10, 12, 14, 16}; D = {5, 10, 15, 20}

A - B

B - A

C - A

D - A

B - C

B - D

C - B

D - B

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