The mean weight of a class of 39 students is 40 kg. When a new student is admitted, the mean weight decreases by 200 g. Find the weight of new student.
Question
The mean weight of a class of 39 students is 40 kg. When a new student is admitted, the mean weight decreases by 200 g. Find the weight of new student.
Solution
Sure, here is the step by step solution:
Step 1: The total weight of the 39 students is 39 * 40 = 1560 kg.
Step 2: When a new student is admitted, the total number of students becomes 40.
Step 3: The new mean weight is 40 kg - 200 g = 39.8 kg.
Step 4: So, the total weight of the 40 students is 40 * 39.8 = 1592 kg.
Step 5: Therefore, the weight of the new student is 1592 kg - 1560 kg = 32 kg.
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