alleryदोन पेन आनी एक पेन्सिल Rs 25; एक पेन आनी दोन पेन्सिलांची किंमत 20 रुपया. एक पेन खर्च जाता
ARs 12
BRs 10
CRs 5
DRs 15
Answer & Solution
Correct answer: B. Rs 10
एक पेन $p$ आनी एक पेन्सिल $q$ खर्च करूं. मागीर $2p+q=25$ आनी $p+2q=20$. पयलें समीकरण दुप्पट करात आनी दुसरें वजा करात: $(4p+2q)-(p+2q)=50-20$, $3p=30$ आनी $p=10$ मेळटा. एक पेन 10 (पर्याय B) रुपया मेळटा.
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