the mean of seven numbers is 63.if the six numbers are 65,70,68,59,73,55.find the seventh number
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Answer:
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Answer: The 7th number is 51.
Step-by-step explanation:
Given: We are given that, mean of 7 numbers is 63. Six numbers are given.
To find: We need to find the 7th number.
Solution:
Let the 7th number be x.
→ Sum of observations = 65 + 70 + 68 + 59 + 73 + 55 + x
→ Sum of observations = 390 + x
We know that, Mean of 7 numbers is 63. Therefore,
→ Number of observations = 7
To calculate mean of a given data, we use the formula:
→ Mean = S / N
[S = Sum of observations, N = Number of observations]
By applying the values,
→ 63 = (390 + x) / 7
→ 63 × 7 = 390 + x
→ 441 = 390 + x
→ x = 441 - 390
→ x = 51
Final Answer: The seventh number is 51.
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