The answer should be D
Number more than 3: 4, 5 and 6
Frequency of each number greater than three:
4- 20
5-30
6-38
Add them you get 88
Total frequency: 200
Therefore: 88/200 = 0.44
Weight of one large bead is 1.5 grams and weight of one small bead is 8.75 grams.
Step-by-step explanation:
Let,
Weight of one large bead = x
Weight of one small bead = y
According to given statement;
12x+8y=88 Eqn 1
5x+2y=25 Eqn 2
Multiplying Eqn 2 by 4

Subtracting Eqn 1 from Eqn 3

Dividing both sides by 8

Putting x=1.5 in Eqn 1

Dividing both sides by 8

Weight of one large bead is 1.5 grams and weight of one small bead is 8.75 grams.
Keywords: linear equation, elimination method
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Looks like the matrix equation is supposed to be

where
presumably denotes the
identity matrix.
Since
are all invertible, we have by multiplying on the left by
,



then multiplying on the right by
,



and finally subtracting
from both sides to end up with
