Question
In a group of 40 persons, the oldest and the youngest
persons have an age difference of 94 years. When these two persons are excluded from the group, the average age of remaining persons is 26 years. If the average age of the entire group is 27.5 years, then find the age of youngest person (in years)?Solution
Let the oldest and yongest age be x and y respectively. Now, x - y = 94 Therefore, x + y + (26 × 38) = 27.5 × 40 94 + y + y = 1100 - 988 94 + 2y = 112 2y = 18 y = 9
Which of the following is true about the immature scale insects?
Insects belong to the phylum_____
Most common silkworm used for the production of Mulberry silk in India isÂ
Which mechanism of resistance involves adverse effects on the biology of insects and their progeny due to biochemical and biophysical factors in the hos...
Chili leaf curl disease is spread by vector_________
Drones are
The type of antennae found in Honeybee are………………
Which of the following insects is the carrier of grassy stunt pathogenic virus?
Which insecticidal compound primarily interferes with the axonal transmission, prolonging the closure of sodium gated channels in the nervous system?
Planting of marigold as trap crop in Tomato and Cotton is used to attract to_______
