Answer:
brainliest?? :))
Step-by-step explanation:
Answer:
Answer:12 ribbonsStep-by-step explanation:We know that 6 of 2/3 m ribbon will give a lenth of 4 m long.Therefore we need 6 x 2 = 12
Answer:

Step-by-step explanation:
We are given that
Mean,
%=68.5/100
Standard deviation,
%=8.2/100
We have to find the probability that a student who wrote the examination had a mark between 80% and 100%.


We know that

Using the formula



Answer:
y = -1
Step-by-step explanation: