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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
The value of (sin 60 º cos 30 º - cos 60 º sin 30 º) is equal to:
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[A] (a²+b²-2)/ 2
[B] (a2-b2<...
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