Madhyamik Examination (WBBSE) - 2017 Mathematics [English Version]
(i) If the ratio of principal and yearly amount be in the ratio 25 : 28, then the yearly rate of interest is —
(a) 3% (b) 12% (c) [tex]10 {5 \over 7}[/tex]% (d) 8%
(ii) Under what condition one root of the quadratic equation ax2 + bx + c = 0 is zero ?
(a) a = 0 (b) b = 0 (c) c = 0 (d) none of these
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