Based on the given data, estimate the number of ‘Televisionbuyers’ for the year 1990.
1982 1984 1986 1988 1990
447 458 489 540 ?
Number of television Buyers in 1982 = 447
Number of Television buyers in 1984 = 458 (447+11)
Number of Television buyers in 1986 = 489 (458+ 11 +20)
Number of Television buyers in 1988 = 540 (489 + 11 +20 +20 )
Number of Television buyers in 1990 = 611 (540 + 11 +20 +20 + 20 )
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