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RRB OS - I Aptitude Test - 4
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RRB OS - I Aptitude Test - 4
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  • Question 1/10
    1 / -0

    The cost price of an article is Rs1760. The shopkeeper sold it allowing 20% discount on the marked price and earned a profit of 35%. What is the marked price of an article?a

    Solutions

    Given,
    Cost price of an article=1760
    Discount=20%
    Profit=35%
    According to the question,

     

  • Question 2/10
    1 / -0

    In a mixture of milk and water, the proportion of water weight was 60%. If in 80 gms of the mixture, 20 gms water was added then what would be the percentage of water?

    Solutions

    Initially water (weight) = 48 gm & milk 32 gm. 
    After adding 20 gm water, the percentage of water = (weight of water)/(total weight of mixture)

     

  • Question 3/10
    1 / -0

    If the dimension(in cm) of a cuboidal box is 6×3×2. Then find the total surface area of the cylindrical rod of radius 7cm and height is equal to the maximum length that can be placed in the box.

    Solutions

    Here length of box = 6 cm
    Width of box = 3 cm
    Height of box = 2 cm

     

  • Question 4/10
    1 / -0

    During a year, a batsman played 30 innings. In the first four innings, he scored an average of 45 runs; in the next 10 innings, he scored an average of 60 runs; in the next 8 innings, he scored an average of 35.5 runs; next three innings he scored an average of 30 runs; in the last 5 innings, he scored zero runs. What was his average per innings for the year?

    Solutions

     

  • Question 5/10
    1 / -0

    Three glass A, B and C contain equal mixtures of Rum and Vodka in the ratio 6 : 1, 5 : 2 and 3 : 1 respectively. If all the three glasses are mixed together in a jug, find the ratio of Rum to Vodka in the jug?

    Solutions

    Given all three glasses contain equal amount of mixture of Rum and Vodka
    So, let mixture in each glass = 1 ml

     

  • Question 6/10
    1 / -0

    A and B entered into a partnership investing Rs 24,000 and Rs 30,000 respectively. After 4 months, A withdrew Rs 10,000 while B invested Rs 10,000 more. After 5 more months, C joins the business with a capital of Rs 40,000. If after two years the profit share of B was Rs 11500, then what was the total profit?

    Solutions

    Ratio of their share A: B: C =
    (24000 x 4 + 14000x 20): (30000 x 4 + 40000 x 20): (40000 x 15)
    = (96+280): (120 + 800): 600
    =376: 920: 600 =94:230:150 =47: 115: 75
      115/237 × T = 11500 ⇒ T = Rs.23700

     

  • Question 7/10
    1 / -0

    Two TVs has same CP. One is sold 30% profit and another has SP of Rs. 6800 more than the first one. What will be the CP of each one if net profit is 40%?

    Solutions

    x × 1.30 + x × 1.30 + 6800 = 2x × 1.40
    2.8x – 2.6x = 6800
    x = 34000

     

  • Question 8/10
    1 / -0

    There are 3 red flowers, 5 white and 3 blue flowers in a basket. 3 flowers are chosen at random. What is the probability that there is at most 1 blue flower?

    Solutions

    Total no. of ways = no blue flower+ 1 blue flower

     

  • Question 9/10
    1 / -0

    Ratio of Nikita’s age and Shruti’s age 3 years ago was 2 : 3. Difference of their ages 5 years hence is 6 years. Determine the ratio of their present age.

    Solutions

    Difference between their age will be always the same. 
    Let 3 years ago age of Nikita and Shruti be 2xand 3x. 
     3x -2 x =6
    x =6
    Present age of Nikita = 2x + 3 = 15 years
    Present age of Shruti = 3x +3 =21 years
    Required ratio = 15:21 =5:7

     

  • Question 10/10
    1 / -0

    A shopkeeper sold 12 wrist watch at a profit of 20% and 8 wrist watch at a profit of 15%. If he had sold all the 20 wrist watch at a profit of 15%, then his profit would have been reduced by Rs. 300 What is the cost price of each wrist watch?

    Solutions

     

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