Given that the ,mean is 8000 and the standard deviation is 1000, thus the probability that <span>tube lasts for more than 11000 hours. will be given by:
P(x>11000)
the z-score is:
z=(x-</span>μ<span>)/</span>σ
x=11000
μ=8000
σ=1000
hence:
z=(11000-8000)/1000
z=3
thus
P(x>11000)=1-P(x<11000)
But
P(x<11000)=P(z<3)=0.9987
hence
P(x>11000)=1-0.9987=0.0013
Answer:
the rate of interest be 5%
Step-by-step explanation:
The computation of the interest rate is shown below:
As we know that
Amount = Principal × (1 + rate of interest)^time period
₹32,560 = ₹22,000 × (1 + rate of interest)^8
₹32,560 ÷ ₹22,000 = (1 + rate of interest)^8
1.48 = (1 + rate of interest)^8
After solving this, the rate of interest be 5%
Answer: I can’t see it very well.
Step-by-step explanation: