Answer: 2.0
Step-by-step explanation:
The given expression :
To solve the given expression , we need to follow BODMAS (Bracket→ Of Divide→ Multiplication →Add →Subtract).
According to BODMAS , first we simplified the expression present inside the brackets .
[10= LCM[10,5]]
[Multiply]
[Simplify]
[Add]
Hence, the value of the expression in the simplified form = 2.0
Answer:
option (a) It will be closer to 30 than to 20
Step-by-step explanation:
Data provided in the question:
For sample 1:
n₁ = 10
variance, s₁² = 20
For sample 2:
n₂ = 15
variance, s₂² = 30
Now,
The pooled variance is calculated using the formula,
on substituting the given respective values, we get
or
= 26.0869
Hence,
the pooled variance will be closer to 30 than to 20
Therefore,
The correct answer is option (a) It will be closer to 30 than to 20