According to survey in 600 consumers of a village, 300 consumers are buying tea of own nation, 250 consumers are buying international tea and 150 consumers are buying both brands of tea. Find the number of consumers who do not buy any brand of tea

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step-by-step explanation:

7.3

step-by-step explanation:

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.