Question

In a batch of 45 students, the average programming speed in Python is 80 lines per hour, but after one student left and 8 new students joined, the average programming speed became 79.6 lines per hour. What is the programming speed of a student who codes 6 lines per hour faster than the student who left, if the total programming speed of the eight new students is 620 lines per hour?

A 86.6 lines per hour
B 58.2 lines per hour
C 78.4 lines per hour
D 50.5 lines per hour
E None of these
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