10. For what value of x, the mode of the following data is 7?
4, 8, 7, 4, 4, 7, 7, 9, 2x - 5
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Answer:
4+8+7+4+4+7+7+9+2x-5/9=7
50+2x-5/9=7
45+2x/9=7
45/9+2x/9=7
5+2x/9=7
2x/9=7-5
2x/9=2
2x=2*9
2x=18
x=18/2
= 9
:•x=9
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