state gov Bihar Police Constable (सिपाही) Mock Test Series 2025 Quantitative Aptitude Algebra Identities

यदि a + b + c = 5 और a2 + b2 + c2 = 15 है, तो a3 + b3 + c3 - 3abc - 27 का मान ज्ञात कीजिए।

1
23
2
27
3
25
4
21
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