# Use the Venn diag

i. From the Venn diagram we get,

U = {1, 2, 3, 4, 7, 9, 10, 11}
[U is the universal set, so it contains all the values of in the diagram]

E = {1, 2, 4, 7}
[The set of values in red Circle]

F = {4, 7, 9, 11}

[The set of values in red Circle]

E F = {1, 2, 4, 7, 9, 11} [elements present either in E or in F]

E F = {4, 7} [elements that are present in both E and F]

ii. U = {1, 2, 3, 4, 7, 9, 10, 11}

n(U) = 8 [no. of elements in U]

E F = {1, 2, 4, 7, 9, 11}

n(E F) = 6 [no. of elements in E F]

E F = {4, 7}

n(E F) = 2 [no. of elements in E F]

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