find common difference
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let a is the first term and d is the common difference of an AP
a 21 = a + (21 - 1) d = a +20 d
a 7 = a + (7 - 1) d = a + 6d
a 21 - 97 = 84
a + 20d - a - 6d = 84
14d = 84
d = 6
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find the value of lambda if mode of the data is 20: 15, 20, 25, 18,13, 15, 25,15, 18, 17,20,25,20 lambda 18 by subtracting.
Hi what's ur Name..
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