RRB Group D Mock Test - 3 - RRB Group D / RPF Constable
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Total expenses of a boarding house are partly fixed and partly varying linearly with the number of boarders. The average expenses per boarder is Rs. 700 when there are 25 boarders and Rs. 600 when there are 50 boarders. What is the average expense per boarder when there are 100 boarders?
Detailed Solution for RRB Group D Mock Test - 3 - Question 5
Let x be the fixed cost and y the variable cost
17500 = x + 25y .....(i)
30000 = x + 50y .....(ii)
Solving the equation (i) and (ii), we get
X = 5000, y = 50
Now if the average expense of 100 boarders be 'A'
Then 100 x A = 5000 + 500 x 100 ⇒ A = 550
Point B is 3 metres North of point A. Point C is 3 metres West of point B. point D is 5 metres South of point C. Point E is 7 metres East of point D. In which of the following directions is point E, with reference to point B ?
According to the Central Statistics Office’s (CSO’s) latest estimate for India’s GDP growth rate, Indian economy is expected to grow at slower ____ percent in 2017-18 compared to the 7.1 per cent in 2016-17
Consider the following statements regarding the waves associated with a moving electron (Matter waves) : 1. Matter waves can move with a velocity greater than that of light. 2. They can exhibit the phenomenon of interference. 3. They represent the probability of finding the electrons at different points in space. 4. They are elastic waves. Which of these statements are correct?
Consider the following statements regarding a motor car battery: 1. The voltage is usually 12 V. 2. Electrolyte used is hydrochloric acid. 3. Electrodes are lead and copper. 4. Capacity is expressed in ampere-hour. Which of the above statements are correct?
"The final Agent Orange raid in Vietnam took place in 1970 areas have begun to bloom again. But 19 years after the war's end, it seems plain that Agent Orange is killing and maiming human beings, something it never intended to do. The apparent toxic fallout from those clouds is a crop of human miseries including cancers, miscarriages and birth defects - that may persist for decades." The offensive substance referred to in this quotationis
In which of the given options, there is one letter leaving two letters of the alphabet in order after the letter placed at odd numbered places and leaving one letter of the alphabet in order after the letters positioned at even numbered letters.
Rajive , a rice merchant , sells different varieties of rice . He mixes one varity of rice costing Rs.16 per kg with another varity of rice costing Rs.21 per kg. In what ratio should these two verities of rice be mixed such that the resultant mixture, upon selling at Rs. 21.45 per kg , will gives a 10% profit?
Three friends X,Y and Z started a partnership business investing money in the ratio of 5 : 4 : 2, respectively for a period of 3 years. What is the amount received by X as the share in the total profit? (I) Total amount invested in the business is Rs. 22000 (II) profit was distributed after a period of 2 years (III) the average amount of profit earned per year is Rs. 2750