Answer:
2520 patterns
Step-by-step explanation:
In 'n' 10! ways, books can be arranged. But, there are also 5! permutation of blue books 'n1', 2! permutation of identical green books 'n2', and 3! permutation identical black books 'n3'.
Therefore, for non identical arrangements:

= 2520
Therefore, the books can be arranged on a shelf in 2520 patterns
Where the heck did x come from!
Answer:
250
Step-by-step explanation:
1 meter = 100 centimeters
2.5 x 100 = 250
Answer:
2/8
Step-by-step explanation:
all the stamps would be 8/8 but she lost 2 therefore giving her 2/8
Find the missing angles using either the triangle sum theorem (a2+b2=c2) or inverse trigonometric ratios