Question

the average cost of 4watches is rupees 230... if one watches lost the average cost of 3 watches become rupees 185 what is the cost of the watch which is lost​

Answer 1

Step-by-step explanation:

Given:-

the average cost of 4watches is rupees 230... if one watches lost the average cost of 3 watches become rupees 185 .

To find:-

what is the cost of the watch which is lost?

Solution:-

The average cost of 4 watches = Rs. 230

Total cost of 4 watches = 230×4 = Rs. 920

If one watch lost then

The average cost of 3 watches = Rs. 185

Total cost of 3 watches = 185×3= Rs. 555

Difference = 920 - 555 = Rs. 365

The cost of lost watch = Total Cost of 4 watches - Total cost of 3 watches=Rs.365

Answer:-

The cost of the watch which is lost = Rs. 365

Used formula:-

Average = Sum of all observations/Number of all observations