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What is the total number of chimes the clock will strike?

A chime clock strikes 1 chime at one o' clock, 2 chimes at two o' clock, 3 chimes at three o' clock, and so forth. What is the total number of chimes the clock will strike in twelve-hour period?

MetroEye: Progression02

The total number of chimes = 1+2+3+.......+12
here n = 12

Sum = \(\dfrac{12 * (12+1)}{2}\) = 6 * 13 = 78

The total number of chimes the clock will strike in twelve-hour period = 78

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