Discussion

Explanation:

The number of users increase by 20% every year.

If the number of users in 2014 were 1,00,000, the number of users in 2018 will be = 10,000 × (1.2)4 = 2,00,736

Number of mobiles phones used by the given 5 companies in 2014 = 80% of 1,00,000 = 80,000.

Number of mobiles phones used by the given 5 companies in 2018 = 65% of 2,07,360 = 1,34,784.

∴ % Increase = 134784-8000080000 × 100 = 68.5%

Hence, option (c).

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