What is the normal percentage of WBC marked as` b_1` ?

Mean mark scored by the students of a class is 53. The mean mark of the girls is 55 and the mean mark of the boys is 50. What is the percentage of girls in the class ? a) 60% b) 40% c) 50% d) 45%

The accuracy in measurement depends on the limit or the resolution of the measuring instrument.A physical quantity P is related to four observables a,b,c and d as P=(a^3)(b^2)/(cd)^(1/2) . The percentage errors in measurements of a, b, c and d are 1% , 3% , 2% and 3% respectively. What is the percetage errors in the measurement of P ?

What is the percentage of oxygen transported by Haemoglobin in the form of Oxyhaemoglobin?

What is the maximum percentage error in the measurement of kinetic energy if percentage errors in mass and speed are 2% and 3% respectively?

The percentage of nucleotide Adenine in DNA isolated from human liver is observed to be 30.7%. What is the expected percentage of T, G and C. Justify.