Two statements are given, followed by three conclusions. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: 1. Some boys are in class II. 2. Shekhar is not in class II. Conclusions: I. Shekhar is not a boy. II. No class II student is a boy. III. Shekhar is a boy.
Two statements are given, followed by three conclusions. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: 1. Some boys are in class II. 2. Shekhar is not in class II. Conclusions: I. Shekhar is not a boy. II. No class II student is a boy. III. Shekhar is a boy. Correct Answer Either conclusion I or III follows.
Statements:
1. Some boys are in class II.
2. Shekhar is not in class II.
The least possible diagram for the given statements is as follows
[ alt="F2 Puja T 22-2-22 Savita D13" src="//storage.googleapis.com/tb-img/production/22/02/F2_Puja%20T_22-2-22_Savita_D13.png" style="width: 264px; height: 54px;">
Conclusions:
I. Shekhar is not a boy → False (It is possible but not definite)
II. No class II student is a boy → False (because given some boys are in class II so no class II student is a boy is wrong)
III. Shekhar is a boy → False (It is possible but not definite)
Conclusion I and III are complementary pair
Hence, “Either conclusion I or III follows”.