Statements : All scores are marks.

All exams are marks.

No mark is an attempt.

Conclusions : I. All exams being scores is a possibility.

II. Some attempts are scores.

III. Some exams are attempts.

All exams are marks(A) + Some marks are scores(I) ⇒ Probable conclusion ⇒ All exams may be scores(A). Hence, conclusion I follows. All scores are marks(A) + No mark is an attempt(E) ⇒ No score is a attempt(E) ⇒ conversion ⇒ Some attempts are not scores(O). Hence, conclusion II does not follow. All exams are scores (A) + Some scores are marks (I) ⇒ No conclusion. Hence, conclusion III does not follow.

A man can row upstream at 18 km/hr and downstream at 24 km/hr. Find the man’s rate in still water and the rate of the current.

...A man can row at 4 kmph in still water. If the velocity of current is 2 kmph and it takes him 5 hour to row to a place and come back, how far is the place?

A boat takes 1/4th time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of current is?

A boat goes 60 km in upstream in 5 hours and takes 3 hours to complete a distance of 12 km in downstream. Find the speed of boat in still water.

Speed of boat is 10 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 54 km downstream?

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