Probability of an event happening=(numbers of ways it can happen) / (total numbers of outcomes)
P=probability that we are both selected
P₁=probability that I am selected and my brother is selected after.
P₂=probability that my brother is selected and I am selected afer.
P=P₁+P₂
P₁=(1/100)*(1/99)=1/9900
P₂=(1/100)*(1/99)=1/9900
P=1/9900 + 1/9900=2/9900≈0,0002≈0.02%
solution: P=2/9900≈0.02%
NON CONVENTIONAL =
Energy generated by using wind, tides, solar geothermal heat and biomass including farm and animal waste as well as human excreta is known as non-conventional energy. All these sources are renewable or inexhaustible and do not cause environment pollution. More over they do not require heavy expenditure.
CONVENTIONAL=
Conventional energy means the energy source which is obtained from fixed reserves in nature like oil, gas and coal. In other words conventional energy is also termed as non-renewable energy sources, or fossil fuels.
B. 1 in 4 which is also 25%
Answer: 4. A Mountain Range
Explanation:
Mountain ranges are formed as a result of compression forces pulling tectonic plates together and forcing them to collide. Upon collision, the affected areas will have no place to go but up and soo will form a mountain range.
The movements of these plates can be quite slow such that mountain ranges take between thousands to hundreds of thousands of years to form. Mt. Everest for instance was formed as a result of such collisions and it increases by only 2 cm a year.
Answer:
Option B
Explanation:
Vertical farming is advantageous over the traditional farming practices in the following ways
a) It require lesser area
b) It uses less water as compared to the water used in traditional farming
c) Different types of crops can be grown at one one time as the same plot area is not used.
Growing crops for a year in not an advantage of vertical farming and hence option B is the correct answer
