3 friend's A,B,C went for weekend party to mc Donalad's restruant and there they measure their weights in some oder in 7 rounds. A,B,C,AB,BC,AC,ABC. Final round measure is 155 kg then find the average weight of all the 7 rounds.
To find the average weight of all the 7 rounds, we need to add up all the measurements and divide the total by 7.
Given that the final round measurement is 155 kg, let's assign variables to each friend's weight:
A = weight of friend A
B = weight of friend B
C = weight of friend C
We can calculate the average weight using the following steps:
1. Since the fourth round measures A and B together (AB), we need to subtract the weight of friend B from the total weight measured in that round to find the weight of friend A: AB - B = A
2. Similarly, in the fifth round, BC - C = B.
3. And in the sixth round, AC - A = C.
Now, let's substitute the values in the expression for the average weight:
Average weight = (A + B + C + AB + BC + AC + ABC) / 7
We know that ABC = 155 kg (from the final round), so we can rewrite the expression:
Average weight = (A + B + C + AB + BC + AC + 155) / 7
To find the average weight, we need the values of A, B, and C. Since the question does not provide these values, we cannot calculate the exact average weight.
To find the average weight of all 7 rounds, we first need to calculate the total weight of all the rounds.
Let's represent the weights of friends A, B, and C as x, y, and z, respectively.
In the first round (A), we measure the weight of friend A, which is x kg.
In the second round (B), we measure the weight of friend B, which is y kg.
In the third round (C), we measure the weight of friend C, which is z kg.
In the fourth round (AB), we measure the combined weight of friends A and B. The total weight will be x + y kg.
In the fifth round (BC), we measure the combined weight of friends B and C. The total weight will be y + z kg.
In the sixth round (AC), we measure the combined weight of friends A and C. The total weight will be x + z kg.
In the seventh and final round (ABC), we measure the combined weight of all three friends A, B, and C. The total weight will be x + y + z kg.
Given that the final round measure is 155 kg, we have x + y + z = 155.
To find the average weight, we need to calculate the total weight of all the rounds and divide it by 7, as we have 7 rounds in total.
Total weight = x + y + z + (x + y) + (y + z) + (x + z) + (x + y + z) = 4x + 4y + 4z
Average weight = (4x + 4y + 4z) / 7
To find the average weight, we need to know the individual weights of friends A, B, and C (x, y, and z).
Please provide the weights of friends A, B, and C, and I can help you calculate the average weight.