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96. A shopkeeper marks the price of an article of original cost ~ 100, after increasing it by 10%. He, then sells it by giving a discount of 10% to the customer. The price at which he sold the article is
~ 100
~ 101
~ 99
None of the above
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97. Which of the following statements is incorrect?
If the four quantities a, b, c, d are proportional, then a x d = b x c
If a, b, c, d are proportional then ac = bd
The inverse proportion of proportion a: b is b:a
If three quantities a, b, c are in geometric progression, then b2 = ac
98. The number of members of an institution is 2500. If the number of members in first year increases by 10% and in the second year decreases by10%, then after 2 yr what is the increase or decrease in the number of members?
Neither decrease nor increase
Increase of 25 members
Decrease of 25 members
99. The simplified forms of 2222 , (22)22 and (222)2 are
216 , 44 , 162.
44 , 28 , 82.
216 , 28 , 82.
162 , 44 , 216.
100. If ax2 + bx + c = 0 is an identity in x, then
x = {-b +/- √(b2 - 4ac)}/2a
c = 0, x = 0, x = -b/a
c = 0, x = b/a, x = -b/a
a = 0, b = 0, c = 0
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