Out of 840 students in a college, the proportion of boys

Statements:

Only Lift are Stair.

All Ladder are Lift.

No Lift is a Step.

Conclusions:

Statements: 

Some Gases are not Solids.

All Solids are Liquid.

Only a few Liquid are Precipitation.

Conclusions:

Statements : All scores are marks.

All exams are marks.

No mark is an attempt.

Statements:

Only a few Plate are Cup.

Some Cup are not spoon.

Some spoon are fork.

Conclusions:

Statement:

 Only a few P are Q         

Only a few Q are P      

Conclusion:        

Statements:

Some books are copies

Only a few copies are papers

All papers are registers

Only a few registers are windows

Statements: No magazine is a newspaper.

                              All newspaper are articles.

Statement:

Some dog are tigers.

Only a few tigers are lions.

All lions are cat.

Conclusion:

Statements:

Only a few Careers are Visions.

Some Visions are not Missions.

Some Missions are not Ambitions.

Statement :   Some X are Y.

Only a few Z are X.

All Y are A.

Conclusion

I. All X are Z

II. Some A are Z