ibps-rrb-os1 2017 · Question 52 of 74

I. x2 − 8x + 15 = 0 II. y2 − 12y + 36 = 0

Quantitative Aptitude (misc)

Aif x>y
Bif x≥y
Cif x<yCorrect
Dif x ≤y
Eif x = y or no relationship can be established.

Answer: C. if x<y

Explanation

I. 𝑥2 − 8𝑥 + 15 = 0 𝑥2 − 3𝑥 − 5𝑥 + 15 = 0 𝑥(𝑥 − 3) − 5(𝑥 − 3) = 0 (𝑥 − 3)(𝑥 − 5) = 0 𝑥 = 3,5 II. 𝑦2 − 12𝑦 + 36 = 0 𝑦2 − 6𝑦 − 6𝑦 + 36 = 0 𝑦(𝑦 − 6) − 6(𝑦 − 6) = 0 (𝑦 − 6)(𝑦 − 6) = 0 𝑦 = 6 ∴ 𝑥 < 𝑦

Source: IBPS RRB PO Prelims 2017 Memory Based Paper (Adda247) · memory-based

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