The average wage of a group of 44 labourers is Rs. 250. If 4 persons receiving average wage of Rs. 275 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. 48. Find the value of ‘K’.
Total wage of 44 labourers in the initial group = 44 × 250 = Rs. 11000 New average wage of the group = 250 + 48 = Rs. 298 New number of labourers in the group = 44 – 4 + 2 = 42 So, according to the question, 11000 – 4 × 275 + 2K = 298 × 42 Or, 11000 – 1100 + 2K = 12516 Or, 9900 + 2K = 12516 Or, 2K = 12516 – 9900 = 2616 Or, K = (2616/2) = 1308
(7/4×18/21)+ (51/7× 28/17) + (25/2 × 48/10) =?
60% of 250 + 14 × 10 - 210 = ?
140% of 1270 + 60% of 2085 = 1881 + ‘?’% of 287
2856 ÷ 34 = ?% of 240
154 × 7 + 480 × 5 =?% of 6956
17.5% of 400 – 24% of 150 = ?
72% of 400 – 23% of 1020 = 120% of ?
666(2/3)% of 30 - 116(2/3)% of 90 =?
I. 8x² - 74x + 165 = 0
II. 15y² - 38y + 24 = 0
12% of 450 + 16% of 1500 = ?
