The mean attendance of a school for a first four day of the week was 780 and for the first five days,it was 840. How many student on the fifth day?
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4×780 = 3120
5×840 = 4200
fifth day students = 4200 - 3120 = 1080
5×840 = 4200
fifth day students = 4200 - 3120 = 1080
manisha83:
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