For the following questions answer them individually
The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined,as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?
Consider the given statement to be true and decide which of the following assumptions is/are implicit in the statement.
When your dress is excellent, many people ask which tailor has stitched that dress.
1. If the dress is bad, people don’t ask about the tailor.
2. People want to know how to stitch the same dress.