LR-DI Mix Set Questions with Solution (Test 4)

Solution:

(b) The two statements mean that atleast one of the two,
i.e. "Sam is ill" or "he is drunk" is true, which clearly
follows in DA.

Solution:

(c) The statement means that Ram did not lose sleep if he
did not hear of a tragedy. Clearly DB follows. BD is not
sure as he might lose sleep because of something as
well.

Solution:

(d) The two statements mean that atleast one of the two,
i.e. "train is late" or "it has derailed" is true, which
clearly follows in BC.

Solution:

(a) The given statement means, 'I did not have a nightmare
if I did not read a story'. CB follows but BC is not sure
as he might have a nightmare because of something
else.

Solution:

(b) AD is not correct as rashes can be because of
something else as well. The only conclusion which is
true is BC, which states that, "I did not get rashes,
which definitely means I did not eat berries".

Solution:

(c) Let the feasibility be decided by the costs involved
i.e., if the relative cost is lower than any other test, than
the test can be said to be feasible. Hence by looking at
the options the percentage of defective pieces lie
between 0.05 and 0.20 the test 2 to be feasible.

Solution:

(d) Test 2 and test 3 have same relative costs for p = 0.2,
hence either of them can be adopted.

Solution:

(a) Test 3 will be feasible for p > 0.2 because it has the
lowest relative cost.

Solution:

(a) Test 1 will be feasible when p < 0.05 because it has the
lowest relative cost.

Solution:

(d) When p < 0.2, then alternatives which can be feasible
is either test 1 or test 2 . But from the given data, it is
not possible to say which test is the best. But it is
definitely clear that test 3 in the most unfeasible test.