TS ICET 23 May 2019 Shift 1 Paper

Question : 127 of 200

Marks: +1, -0

If x , y (x < y) are primes satisfying x + y = 30, then the number ofsuch pairs (x , y) is

Solution:

x + y = 30

The possible solutions are

(7, 23), (11,19), (13, 17)

∴ Required number = 3

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