Question

दो विभिन्न मूल्य वाली 35 कर्मों का मूल्य ₹60 है यदि एक सस्ती कलम का मूल्य डेढ़ रुपया और एक महंगी कलम का मूल्य ₹2 है तो कुल कितनी मांगी कल में कर दी जा सकती है

Answer 1

Answer:

The number of cheaper pen = 20,

And, the number of expensive pen = 15

Step-by-step explanation:

Let x be the number of cheaper pen and y be the number of expensive number,

Total number of pens = x + y

⇒ x + y = 35, -----(1)

Since, total amount spent is 60 rupees  in which each cheaper pen costs 1.5 rupees and each expensive pen costs 2 rupees,

⇒ 1.5 x + 2 y = 60

⇒ 0.3 x + 0.4 y = 12

⇒ 3x + 4y = 120  ------(2),

Equation (2) - 3 × equation (1),

y = 15,

From equation (1),

x + 15 = 35 ⇒ x = 20

Answer 2

Answer:

Step-by-step explanation: