A dealer purchased 250 bulbs for Rs10 each. However, 12 bulbs got fused which he had to throw away. He sold the remaining bulbs at Rs 12 each. Find the gain or loss per cent in the dealing.​

CP of 1bulb =Rs10

CP of 250bulbs=Rs2500

Number of defective bulbs 12

remaining bulbs =250−12=238

SP of 1bulb =Rs12

SP of 238bulbs=Rs2856

profit=Total SP-CP=2856−2500=Rs356

profit%=[  

CP

loss

​  

×100]=  

2500

356

​  

×100=14.24%

Step-by-step explanation:

step-by-step explanation:

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.