When two refrigerants are mixed in the proper proportions, the mixture forms a third refrigerant called

25) The average of a, b, c is 20 and that of b, c, d is 25; if d = 30, the value of a is

26) HCF of two numbers is 12 and their product is 288. LCM of the two numbers is

27) Among the following, which statement is incorrect regarding "dehumidification process"?

28) What does the curved lines on a psychometric chart indicate?