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Standard X
Biology
Twins
Mary and John...
Question

Mary and John are siblings. Mary's kids, Tom and Alice, are twins. They are all soccer players. The worst player's twin and the best player are of the opposite gender. Find the worst player, if the worst and the best player are the same age?

A
John
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B
Tom
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C
Alice
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D
Data insufficient
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Solution

The correct option is D Data insufficient
Possible cases: Best player and the worst player are twins: It can be the woman's daughter and son, respectively, or it can also be the opposite.
Similarly, it can be herself and her brother or converse.

The question doesn’t provide enough information for the deduction.

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Q.

Statements

All football players are cricketers.

Some hockey players are football players.

No cricketer is a basketball player.

Conclusions

I.Some hockey players are cricketers.

II.No basketball player is a football player.

III.Some hockey players are basketball players.

IV.Some cricketers are football players.


Q. Some statements are given, followed by some conclusions. Consider the statements to be true even if they seem to be at variance from commonly known facts. Decide which of the given conclusions follow from the given statements.

Statements:
All cricketers are football players.
Some hockey players are cricketers
No football player is a basketball player
No basketball player is a hockey player.

Conclusions:
I. Some hockey players are football players.
II. No basketball player is a cricketer.
III. Some hockey players are basketball.
IV. Some football players are cricketers.
Q. Sixteen players S1,S2,...,S16 play in a tournament. They are divided into eight pairs at random. From each pair a winner is decided on the basis of a game played between the two players of the pair. Assuming that all the players are to equal strength. The probability that the players S1 is among the eight winners is
Q. Sixteen players S1,S2,....S16 play in a tournament. They are divided into eight pairs at random. From each pair a winner is decided on the basis of a game played between the two players of the pair. Assume that all the players are of equal strength. The probability that exactly one of the two players S1 and S2 is among the eight winners is k15.Find the value of k?
Q. 30 cricket players and 20 Kho-Kho players are traning on a field. What is the ratio of cricket players to the total numbers of players?
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