a 3. The average attendance of a school for the first three days of a week 325 and for the first four days is 320. How many were present on the fourth day?
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a 3. The average attendance of a school for the first three days of a week 325 and for the first four days is 320. How many were present on the fourth day?
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Answer:
305
Step-by-step explanation:
Avg= sum/no
Avg of 1st 3 days=sum/no
avg=sum/3
325=sum/3
sum= 325*3
sum= 975
Avg of 1st 4 days= sum/no
avg=sum/4
320=sum/4
sum=320*4
sum=1280
1280-975
305
305 students present in forth day