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Class 10 > Learn Mathematics > The mean of 10, 15, x, 5, 15 is 15. What is the value...
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The mean of 10, 15, x, 5, 15 is 15. What is the value of x?

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Math Magician

Mean=sum of all observations÷total no. of observations 15 = (10+15+X+5+15) ÷ 5 75 = 45 + X X = 75 - 45 X = 30 So x is 3
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Teacher

The mean or the average for these 5 numbers being 15, their sum is 5 x 15 = 75 The total of other numbers excluding x is 45, x = 75-45 = 30
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Math Tution

30.
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Tutor

(10+15+x+5+15)/5=15 45+x=5×15 45+x=75 x=75-45 x=30
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Tutor

(10+15+x+5+15)/5=15 So 45 + x = 5*15 X=75-45=30
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Trainer

10+15+x+5+15=(45+x)/5=15 45+x=15*5 x=75-45 x=30 Thank you. x=30
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You have a bright future in you're hands

X value is 30
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Wizard of Mathematics

Mean=sum of all observations÷total no. of observations 15=(10+15+x+5+15)÷5 15×5=45+x x=75-45 X=30
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Math expert

X=30
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