Question

The average weight of the first 11 people in a group
of 12 people is 95 kg. If the weight of the 12th
person is 33 kg more than the average weight of
the whole group, the weight of the 12th person in
kg is:​

Answer 1

the weight of the 12th person is 128 kg

Step-by-step explanation:

step 1. the average of weight of 11 person is 95 kg.

step 2. the weight of 12th person is 33 kg more than the average weight of the 11 person.

step 3. So, the weight of the 12 this person is

95 kg + 33 kg= 128 kg

according to me you make this question by your self.

Answer 2

131 kg

Step-by-step explanation:

Average weight of the first 11 = 95 kg

Total weight of the first 11 = 95 × 11 = 1045 kg

Let weight of 12th = x kg

Average weight of whole group =

$\frac{1045 + x}{12}$

Now, weight of the 12th person is 33 kg more than the average weight of the whole group.

$x = \frac{1045 + x}{12} + 33 \\ x = \frac{1045 + x + 396}{12} \\ x = \frac{1441 + x}{12} \\ 12x = 1441 + x \\ 11x = 1441 \\x = \frac{1441}{11} \\ x = 131$

So, weight of the 12th person is 131 kg