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Explanation:

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By conditions,

a-25 = s-24

∴ 4a = 5s – 2 …(i)

Also, a+s-42 = 27

∴ a + s = 58 …(ii)

Solving (i) and (ii),

a = 32 and s = 26

Also, a-2+s-2+p-23 = 24

∴ p = 20

∴ Average age of Sumita and Paramita 3 years from now = (s + p + 6)/2 = 26 years.

Hence, option (b).

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