UPSC Prelims

Mathematics

Theme:
Average / औसत

Q78 2017, Average

The average rainfall in a city for the first four days was recorded to be 0.40 inch. The rainfall on the last two days was in the ratio of 4:3. The average of six days was 0.50 inch. What was the rainfall on the fifth day?

किसी शहर में पहले चार दिन औसत वर्षा 0.40 इंच दर्ज की गई। आखिरी दो दिन 4:3 के अनुपात में वर्षा हुई। छः दिनों की औसत वर्षा 0.50 इंच थी। पाँचवें दिन कितनी वर्षा हुई?