A group of 5 friends went to a restaurant. If 4 of them paid Rs. 200 each and the fifth paid Rs. x, the average bill per person came out to be Rs.210. What is the value of x?
A group of 5 friends went to a restaurant. If 4 of them paid Rs. 200 each and the fifth paid Rs. x, the average bill per person came out to be Rs.210. What is the value of x?
5 दोस्तों का एक समूह रेस्टोरेंट गया। अगर 4 दोस्तों ने प्रत्येक ने 200 रुपए भुगतान किए और पाँचवें ने ₹x भुगतान किया, तो प्रति व्यक्ति औसत बिल ₹210 आया। ₹x की मान कितनी होगी?
Detailed Solution & Logic
Correct Answer:
Rs. 250/ 250रुपेय
दी गई जानकारी:
- कुल दोस्त = 5
- 4 दोस्तों ने प्रत्येक ₹200 दिए → कुल = 4 × 200 = 800
- पाँचवें ने ₹x दिया
- औसत बिल = ₹210
औसत का फार्मूला:
$ \text{औसत} = \frac{\text{कुल बिल}}{\text{व्यक्तियों की संख्या}} $
इसे डालते हैं:
$ 210 = \frac{800 + x}{5} $
दोनों तरफ 5 से गुणा करें:
800 + x = 1050
x निकालें:
x = 1050 - 800 = 250
सही उत्तर: Rs. 250 / 250 रुपये ✅
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