In a school, the bell is rung once after each half an hour. The school – McqOptions

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1.	In a school, the bell is rung once after each half an hour. The school starts at 8:00 a.m. and closes at 1: 30 p.m. The bell is rung 3 times continuously, at the time of beginning, at the time of lunch break at 10:00 and 10:30 a.m. and at the end. How many times is the bell rung every day?
A.	21
B.	22
C.	19
D.	20
Answer» D. 20

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