IIT-JEE Exam

A multiple choice examination has 5 questions.
Each question has three alternative answers of
which exactly one is correct. The probability that
a student will get 4 or more correct answers just
by guessing is

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IIT-JEE Other Question

The circle passing through (1, –2) and touching the
axis of x at (3,0) also passes through the point -
(1) (5, –2) (2) (–2, 5)
(3) (–5, 2) (4) (2, –5)
Which of the following represents the correct order
of increasing first ionization enthalpy for Ca, Ba, S,
Se and Ar ?
(1) Ba < Ca < Se < S < Ar
(2) Ca < Ba < S < Se < Ar
(3) Ca < S < Ba < Se < Ar
(4) S < Se < Ca < Ba < Ar