[Answer] How many overs a bowler can ball in one inning in an ODI?

Step 1 : Introduction to the question "How many overs a bowler can ball in one inning in an ODI?"

...Each bowler is restricted to bowling a maximum of 10 overs (fewer in the case of rain-reduced matches and in any event generally no more than one fifth or 20% of the total overs per innings). Therefore, each team must comprise at least five competent bowlers (either dedicated bowlers or all-rounders).

[Answer] how many players are allowed outside 30 yards circle in first 10 overs of an inning?

Step 1 : Introduction to the question "how many players are allowed outside 30 yards circle in first 10 overs of an inning?"

...During the first 10 overs of an innings a maximum of 2 fielders are allowed outside the 30-yard circle. This is called 1st powerplay. Between overs 11 and 40 a maximum of 4 fielders are allowed outside the 30-yard circle. In the final 10 overs (41–50) a maximum of 5 fielders will be allowed to field outside the 30-yard circle.