CTET Solved Paper - RTET Feburary 2011 Paper2

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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

  • Option : C
  • Explanation : Marked price = (CP+ (10% of CP) = 100 + (0.1 x100) =t 110 Discount = 10% of 110 = { 11 :. Selling price= 110-11= ~99
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97. Which of the following statements is incorrect?

  • Option : B
  • Explanation : a : b : : c: d => a/b = c/d => a x d=b x c So, ac = bd is incorrect.
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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?

  • Option : C
  • Explanation : Number of member after first year. = 2500 (1 + 10/100)= 2750. Number of member after second year. = 2750 (1- 10 1100) = 2475. Decrease in the number of members after 2 yr. = 2500 - 2475 = 25
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99. The simplified forms of 2222 , (22)22 and (222)2 are

  • Option : A
  • Explanation : 2222 = 224 = 216.
    (22)22 = 44.
    (222)2 = (24)2 = 162.
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100. If ax2 + bx + c = 0 is an identity in x, then

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