What is the frequency of an event?
a. probability
b. degree
c. expected occurrence
d. identification

Option A, Probability

Explanation:

Probability defines the possibility of occurrence of an event.  

Let "n" be the total number of desired outcome of an activity and "A" is the sum of all possible outcomes. Thus, in this case probability is defined by following mathematical relation –  

For example -  

Calculate the probability of occurrence of head when a coin is tossed one timed ?

Here, Total number of desired outcome i.e head when a coin is tossed once  

blue

light-years

magnitude

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.