यदि (7) वस्तुओं में से (4) चुनी जाएँ तो छोड़ने वाली वस्तुओं की संख्या से कौन-सा समान combination बनेगा?
If (4) objects are chosen from (7) objects which equal combination is formed by the number of objects left?
Explanation opens after your attempt
B. \(^{7}C_3\)
Concept
Choosing (4) means leaving (3) so \(^{7}C_4=^{7}C_3\). In exams look at both chosen and not chosen.
Why this answer is correct
The correct answer is B. \(^{7}C_3\). Choosing (4) means leaving (3) so \(^{7}C_4=^{7}C_3\). In exams look at both chosen and not chosen.
Exam Tip
(4) चुनने का अर्थ (3) छोड़ना है इसलिए \(^{7}C_4=^{7}C_3\) है। परीक्षा में chosen और not chosen दोनों देखें।
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