जर 55, 60 आणि 45 विद्यार्थ्यांच्या तीन बॅचचे सरासरी गुण अनुक्रमे 50, 55 आणि 60 असतील तर...

A shopkeeper bought 20 kg of rice at Rs. 55 per kg, 25 kg of rice at Rs. 50 per kg and 35 kg of rice at Rs. 60 per kg. He spent a sun of Rs. 150 on transportation. H mixed all the three types of rice and sold all the stock at Rs. 62.56 kg. His profit percent in the entire transaction is दुकानदार ने 20 kg चावल को Rs.55 kg पर 50 रुपये प्रति kg और 35 रुपये किलो चावल .60 per kg की दर से खरीदा। उन्होंने परिवहन पर 'रु। 150' की राशि खर्च की। उन्होंने तीनों प्रकार के चावल को मिलाया और सभी स्टॉक को Rs.62.56 per किलो पर बेचा। पूरे लेनदेन में उसका लाभ प्रतिशत है:

The daily wages of 30 workers (in Rs.) in a factory is given below. 40, 45, 35, 70, 60, 52, 49, 46, 65, 56, 60, 35, 45, 40, 50, 56, 57, 48, 55, 52, 50, 70, 75, 80, 50, 45, 52, 65, 72, 50. How many workers are earning less than Rs. 50 per day ?

If the average marks of three batches of 55 , 60 and 45 students respectively is 50 , 55 and 60 , then what are the average marks of all the students ?

The following is the distribution of weights (in kg) of 50 persons: Marks:, 50-55, 55-60, 60-65, 65-70, 70-75, 75-80, 80-85, 85-90 No. of Person, 12, 8, 5, 4, 5, 7, 6, 3 Draw a histogram for the above data.