Answer: 2 grams
Step-by-step explanation:
Answer:
taking a vector approach to the question
2
−−−→
M
N
=
3
−−→
M
P
⇒
2
(
n
−
−
m
−−
)
=
3
(
p
−
−
m
−−
)
⇒
2
n
−
−
2
m
−−
=
3
p
−
−
3
m
−−
⇒
3
p
−
=
2
n
−
+
m
−−
⇒
3
p
−
=
2
(
4
−
2
)
+
(
10
13
)
⇒
3
p
−
=
(
8
−
4
)
+
(
10
13
)
=
(
18
9
)
⇒
p
−
=
1
3
(
18
9
)
=
(
6
3
)
⇒
P
=
(
6
,
3
)
Sorry the format dident turn out how i wanted it to be, I hope this helps.
As, order is important so we use permutation,
total no. of students= n=8
selected students= r=3
nPr= n!/(n-r)! = 8!/(8-3)! =336 different ways
The answer is B. for the ineq
