The average wage of a group of 20 labourers is Rs. 420. If 4 persons receiving average wage of Rs. 300 leave the group and 2 persons receiving average wage of Rs. K join the group, then the average wage of the group increases by Rs. 50. Find the value of ‘K’.
Total wage of 20 labourers in the initial group = 20 × 420 = Rs. 8400 New average wage of the group = 420 + 50 = Rs. 470 New number of labourers in the group = 20 – 4 + 2 = 18 So, according to the question, 8400 – 4 × 300 + 2K = 470 × 18 Or, 8400 – 1200 + 2K = 8460 Or, 7200 + 2K = 8460 Or, 2K = 8460 – 7200 = 1260 Or, K = (1260/2) = 630
Who likes Fossil?
Seven persons, P, Q, R, S, T, U and V sit in a linear row and face in the north direction, but not necessarily in the same order. Two persons sit betwee...
Who sits third to the right of the person, who likes Coca cola in the row arrangement?
If O related to Y, P related to J then who among the following is related to M?
Who among the following likes Purple?
X has tuition centre in which place?
Which of the following replaces blank ___(5)___?
How is U's sister - in-law related to Q's grandmother?
Four of the following five are alike in a certain way as per the given arrangement and hence form a group, which one of the following does not belong to...
Who among the following lives at the topmost floor?