Explanation : Let weight of 1Oth student = x kg
Average weight of 9 students = 60 kg
total weight of 9 students = 9 x 60 = 540 kg
Now, Average weight of 10 students
= (540 + x)/10
According to the question,
x - (540 + x)/10 = 9
1Ox - 540 - x = 90
9x = 90 + 540 = 630
x = 630/9 = 70 kg
Explanation : Observe the classical square of opposition
below:
If A proposition is true, E proposition-which
is its contrary-- is false, O proposition-
which is its contradictory-- is false; and I
proposition-which is its subaltern-is true.
Explanation : Classroom teaching is a planned procedure
carried out by the teacher who is ideally in
complete control of its direction and progress.
It means that the teacher also has control over
the self (conduct, approach, attitude, etc.),
the mode of communication and method of
delivery of the lesson to be transacted.
Explanation : If the assessment procedure is rigid about
the language, mode, means and method of
the assessment and promotes certain culture
specific values; it is biased against those
who may be comfortable with different
ones. So, if assessment procedures are
flexible and diverse to make disadvantaged
students comfortable, it doesn't contribute
to assessment bias.