lexialanabradshaw
Answered

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can someone help me pls

Can Someone Help Me Pls class=

Sagot :

Part A

Multiply each age with its corresponding frequency

  • 19*2 = 38
  • 20*3 = 60
  • 21*1 = 21
  • 22*4 = 88
  • 23*1 = 23

Then add up those products

38+60+21+88+23 = 230

We divide that sum over the total frequency of 11 (since 2+3+1+4+1 = 11).

mean = 230/11 = 20.9 approximately

Answer: 20.9

Nice work on getting the correct answer.

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Part B

x = age of the new player

Adding x to the sum of the products 230, and then dividing over 11+1 = 12 will get us the new mean of 22.

The 230 represents the sum of the ages of the original eleven people. The expression 230+x represents the sum of the twelve ages.

So,

(230+x)/12 = 22

230+x = 12*22

230+x = 264

x = 264-230

x = 34

Answer: 34

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